{"asset": "syringe-needle-gauge-dimensions", "asset_type": "tolerance", "body": "The physical dimensions behind a needle gauge number: nominal outer diameter, inner diameter, wall thickness, and dead volume per 25.4 mm of needle. Gauge number alone is not enough to answer 'will this needle prime my 10 uL syringe' or 'what is the ID of a 26s needle' \u2014 the wall marker ('s', 'RW') changes the ID at the same gauge, and dead volume is what actually determines whether a small-volume syringe can be primed. Two independent publishers are cited and they agree where they overlap: Hamilton, a syringe maker, covers 34 gauge down to 10 gauge with dead volumes; New England Small Tube, a tube manufacturer, covers 6 to 27 gauge in regular wall with millimetre figures of its own. Each keeps its own naming, so the same needle can appear twice \u2014 as '18 gauge needle' and as '18 RW' \u2014 with a separate quote behind each.\n", "description": "The physical dimensions behind a needle gauge number: nominal outer diameter, inner diameter, wall thickness, and dead volume per 25.4 mm of needle. Gauge number alone is not enough to answer 'will this needle prime my 10 uL syringe' or 'what is the ID of a 26s needle' \u2014 the wall marker ('s', 'RW') changes the ID at the same gauge, and dead volume is what actually determines whether a small-volume syringe can be primed. Two independent publishers are cited and they agree where they overlap: Hamilton, a syringe maker, covers 34 gauge down to 10 gauge with dead volumes; New England Small Tube, a tube manufacturer, covers 6 to 27 gauge in regular wall with millimetre figures of its own. Each keeps its own naming, so the same needle can appear twice \u2014 as '18 gauge needle' and as '18 RW' \u2014 with a separate quote behind each.", "file": "index.md", "generated": true, "harvested": "2026-08-27", "key_field": "gauge_number", "licence": "Dimensional facts (a physical tolerance table) are not copyrightable; cited with attribution to the publishing vendor's technical reference page. No page content beyond the per-gauge figures is reproduced.", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart", "https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "dataset", "verified": false} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 10 gauge needle\n\n**Nominal O.D. (mm):** 3.404\n\n**Nominal I.D. (mm):** 2.693\n\n**Wall thickness (mm):** 0.356\n\n**Dead volume (uL per 25.4 mm):** 144.641 \u00b5L/25.4 mm\n\n> 10 gauge needle | 3.404 | 2.693 | 0.356 | 144.641 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "144.641 \u00b5L/25.4 mm", "file": "10-gauge-needle.md", "gauge_number": "10 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "10-gauge-needle", "inner_diameter_mm": "2.693", "outer_diameter_mm": "3.404", "source_quote": "10 gauge needle | 3.404 | 2.693 | 0.356 | 144.641 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "10 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.356"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 10 RW\n\n**Nominal O.D. (mm):** 3.40\n\n**Nominal I.D. (mm):** 2.69\n\n**Wall thickness (mm):** .356\n\n> 10 RW 3.40 3.38/3.43 .356 2.69 2.64/2.74\n\nSource: \n", "file": "10-rw.md", "gauge_number": "10 RW", "generated": true, "harvested": "2026-08-27", "id": "10-rw", "inner_diameter_mm": "2.69", "outer_diameter_mm": "3.40", "source_quote": "10 RW 3.40 3.38/3.43 .356 2.69 2.64/2.74", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "10 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".356"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 11 gauge needle\n\n**Nominal O.D. (mm):** 3.048\n\n**Nominal I.D. (mm):** 2.388\n\n**Wall thickness (mm):** 0.33\n\n**Dead volume (uL per 25.4 mm):** 113.728 \u00b5L/25.4 mm\n\n> 11 gauge needle | 3.048 | 2.388 | 0.33 | 113.728 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "113.728 \u00b5L/25.4 mm", "file": "11-gauge-needle.md", "gauge_number": "11 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "11-gauge-needle", "inner_diameter_mm": "2.388", "outer_diameter_mm": "3.048", "source_quote": "11 gauge needle | 3.048 | 2.388 | 0.33 | 113.728 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "11 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.33"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 11 RW\n\n**Nominal O.D. (mm):** 3.05\n\n**Nominal I.D. (mm):** 2.39\n\n**Wall thickness (mm):** .330\n\n> 11 RW 3.05 3.02/3.07 .330 2.39 2.34/2.44\n\nSource: \n", "file": "11-rw.md", "gauge_number": "11 RW", "generated": true, "harvested": "2026-08-27", "id": "11-rw", "inner_diameter_mm": "2.39", "outer_diameter_mm": "3.05", "source_quote": "11 RW 3.05 3.02/3.07 .330 2.39 2.34/2.44", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "11 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".330"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 12 gauge needle\n\n**Nominal O.D. (mm):** 2.769\n\n**Nominal I.D. (mm):** 2.159\n\n**Wall thickness (mm):** 0.305\n\n**Dead volume (uL per 25.4 mm):** 93 \u00b5L/25.4 mm\n\n> 12 gauge needle | 2.769 | 2.159 | 0.305 | 93 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "93 \u00b5L/25.4 mm", "file": "12-gauge-needle.md", "gauge_number": "12 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "12-gauge-needle", "inner_diameter_mm": "2.159", "outer_diameter_mm": "2.769", "source_quote": "12 gauge needle | 2.769 | 2.159 | 0.305 | 93 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "12 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.305"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 12 RW\n\n**Nominal O.D. (mm):** 2.77\n\n**Nominal I.D. (mm):** 2.16\n\n**Wall thickness (mm):** .305\n\n> 12 RW 2.77 2.74/2.79 .305 2.16 2.11/2.21\n\nSource: \n", "file": "12-rw.md", "gauge_number": "12 RW", "generated": true, "harvested": "2026-08-27", "id": "12-rw", "inner_diameter_mm": "2.16", "outer_diameter_mm": "2.77", "source_quote": "12 RW 2.77 2.74/2.79 .305 2.16 2.11/2.21", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "12 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".305"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 13 gauge needle\n\n**Nominal O.D. (mm):** 2.413\n\n**Nominal I.D. (mm):** 1.804\n\n**Wall thickness (mm):** 0.305\n\n**Dead volume (uL per 25.4 mm):** 64.895 \u00b5L/25.4 mm\n\n> 13 gauge needle | 2.413 | 1.804 | 0.305 | 64.895 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "64.895 \u00b5L/25.4 mm", "file": "13-gauge-needle.md", "gauge_number": "13 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "13-gauge-needle", "inner_diameter_mm": "1.804", "outer_diameter_mm": "2.413", "source_quote": "13 gauge needle | 2.413 | 1.804 | 0.305 | 64.895 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "13 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.305"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 13 RW\n\n**Nominal O.D. (mm):** 2.41\n\n**Nominal I.D. (mm):** 1.80\n\n**Wall thickness (mm):** .305\n\n> 13 RW 2.41 2.39/2.44 .305 1.80 1.75/1.85\n\nSource: \n", "file": "13-rw.md", "gauge_number": "13 RW", "generated": true, "harvested": "2026-08-27", "id": "13-rw", "inner_diameter_mm": "1.80", "outer_diameter_mm": "2.41", "source_quote": "13 RW 2.41 2.39/2.44 .305 1.80 1.75/1.85", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "13 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".305"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 14 gauge needle\n\n**Nominal O.D. (mm):** 2.109\n\n**Nominal I.D. (mm):** 1.6\n\n**Wall thickness (mm):** 0.254\n\n**Dead volume (uL per 25.4 mm):** 51.076 \u00b5L/25.4 mm\n\n> 14 gauge needle | 2.109 | 1.6 | 0.254 | 51.076 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "51.076 \u00b5L/25.4 mm", "file": "14-gauge-needle.md", "gauge_number": "14 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "14-gauge-needle", "inner_diameter_mm": "1.6", "outer_diameter_mm": "2.109", "source_quote": "14 gauge needle | 2.109 | 1.6 | 0.254 | 51.076 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "14 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.254"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 14 RW\n\n**Nominal O.D. (mm):** 2.11\n\n**Nominal I.D. (mm):** 1.60\n\n**Wall thickness (mm):** .254\n\n> 14 RW 2.11 2.08/2.13 .254 1.60 1.55/1.65\n\nSource: \n", "file": "14-rw.md", "gauge_number": "14 RW", "generated": true, "harvested": "2026-08-27", "id": "14-rw", "inner_diameter_mm": "1.60", "outer_diameter_mm": "2.11", "source_quote": "14 RW 2.11 2.08/2.13 .254 1.60 1.55/1.65", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "14 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".254"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 15 gauge needle\n\n**Nominal O.D. (mm):** 1.829\n\n**Nominal I.D. (mm):** 1.372\n\n**Wall thickness (mm):** 0.229\n\n**Dead volume (uL per 25.4 mm):** 37.529 \u00b5L/25.4 mm\n\n> 15 gauge needle | 1.829 | 1.372 | 0.229 | 37.529 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "37.529 \u00b5L/25.4 mm", "file": "15-gauge-needle.md", "gauge_number": "15 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "15-gauge-needle", "inner_diameter_mm": "1.372", "outer_diameter_mm": "1.829", "source_quote": "15 gauge needle | 1.829 | 1.372 | 0.229 | 37.529 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "15 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.229"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 15 RW\n\n**Nominal O.D. (mm):** 1.83\n\n**Nominal I.D. (mm):** 1.37\n\n**Wall thickness (mm):** .229\n\n> 15 RW 1.83 1.82/1.84 .229 1.37 1.33/1.41\n\nSource: \n", "file": "15-rw.md", "gauge_number": "15 RW", "generated": true, "harvested": "2026-08-27", "id": "15-rw", "inner_diameter_mm": "1.37", "outer_diameter_mm": "1.83", "source_quote": "15 RW 1.83 1.82/1.84 .229 1.37 1.33/1.41", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "15 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".229"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 16 gauge needle\n\n**Nominal O.D. (mm):** 1.651\n\n**Nominal I.D. (mm):** 1.194\n\n**Wall thickness (mm):** 0.229\n\n**Dead volume (uL per 25.4 mm):** 28.444 \u00b5L/25.4 mm\n\n> 16 gauge needle | 1.651 | 1.194 | 0.229 | 28.444 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "28.444 \u00b5L/25.4 mm", "file": "16-gauge-needle.md", "gauge_number": "16 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "16-gauge-needle", "inner_diameter_mm": "1.194", "outer_diameter_mm": "1.651", "source_quote": "16 gauge needle | 1.651 | 1.194 | 0.229 | 28.444 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "16 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.229"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 16 RW\n\n**Nominal O.D. (mm):** 1.65\n\n**Nominal I.D. (mm):** 1.19\n\n**Wall thickness (mm):** .229\n\n> 16 RW 1.65 1.64/1.66 .229 1.19 1.16/1.23\n\nSource: \n", "file": "16-rw.md", "gauge_number": "16 RW", "generated": true, "harvested": "2026-08-27", "id": "16-rw", "inner_diameter_mm": "1.19", "outer_diameter_mm": "1.65", "source_quote": "16 RW 1.65 1.64/1.66 .229 1.19 1.16/1.23", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "16 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".229"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 17 gauge needle\n\n**Nominal O.D. (mm):** 1.473\n\n**Nominal I.D. (mm):** 1.067\n\n**Wall thickness (mm):** 0.203\n\n**Dead volume (uL per 25.4 mm):** 22.715 \u00b5L/25.4 mm\n\n> 17 gauge needle | 1.473 | 1.067 | 0.203 | 22.715 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "22.715 \u00b5L/25.4 mm", "file": "17-gauge-needle.md", "gauge_number": "17 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "17-gauge-needle", "inner_diameter_mm": "1.067", "outer_diameter_mm": "1.473", "source_quote": "17 gauge needle | 1.473 | 1.067 | 0.203 | 22.715 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "17 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.203"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 17 RW\n\n**Nominal O.D. (mm):** 1.47\n\n**Nominal I.D. (mm):** 1.07\n\n**Wall thickness (mm):** .203\n\n> 17 RW 1.47 1.46/1.49 .203 1.07 1.03/1.10\n\nSource: \n", "file": "17-rw.md", "gauge_number": "17 RW", "generated": true, "harvested": "2026-08-27", "id": "17-rw", "inner_diameter_mm": "1.07", "outer_diameter_mm": "1.47", "source_quote": "17 RW 1.47 1.46/1.49 .203 1.07 1.03/1.10", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "17 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".203"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 18 gauge needle\n\n**Nominal O.D. (mm):** 1.27\n\n**Nominal I.D. (mm):** 0.838\n\n**Wall thickness (mm):** 0.216\n\n**Dead volume (uL per 25.4 mm):** 14.011 \u00b5L/25.4 mm\n\n> 18 gauge needle | 1.27 | 0.838 | 0.216 | 14.011 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "14.011 \u00b5L/25.4 mm", "file": "18-gauge-needle.md", "gauge_number": "18 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "18-gauge-needle", "inner_diameter_mm": "0.838", "outer_diameter_mm": "1.27", "source_quote": "18 gauge needle | 1.27 | 0.838 | 0.216 | 14.011 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "18 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.216"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 18 RW\n\n**Nominal O.D. (mm):** 1.27\n\n**Nominal I.D. (mm):** 0.84\n\n**Wall thickness (mm):** .216\n\n> 18 RW 1.27 1.26/1.28 .216 0.84 0.80/0.88\n\nSource: \n", "file": "18-rw.md", "gauge_number": "18 RW", "generated": true, "harvested": "2026-08-27", "id": "18-rw", "inner_diameter_mm": "0.84", "outer_diameter_mm": "1.27", "source_quote": "18 RW 1.27 1.26/1.28 .216 0.84 0.80/0.88", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "18 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".216"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 19 gauge needle\n\n**Nominal O.D. (mm):** 1.067\n\n**Nominal I.D. (mm):** 0.686\n\n**Wall thickness (mm):** 0.191\n\n**Dead volume (uL per 25.4 mm):** 9.389 \u00b5L/25.4 mm\n\n> 19 gauge needle | 1.067 | 0.686 | 0.191 | 9.389 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "9.389 \u00b5L/25.4 mm", "file": "19-gauge-needle.md", "gauge_number": "19 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "19-gauge-needle", "inner_diameter_mm": "0.686", "outer_diameter_mm": "1.067", "source_quote": "19 gauge needle | 1.067 | 0.686 | 0.191 | 9.389 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "19 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.191"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 19 RW\n\n**Nominal O.D. (mm):** 1.07\n\n**Nominal I.D. (mm):** 0.69\n\n**Wall thickness (mm):** .191\n\n> 19 RW 1.07 1.05/1.08 .191 0.69 0.65/0.72\n\nSource: \n", "file": "19-rw.md", "gauge_number": "19 RW", "generated": true, "harvested": "2026-08-27", "id": "19-rw", "inner_diameter_mm": "0.69", "outer_diameter_mm": "1.07", "source_quote": "19 RW 1.07 1.05/1.08 .191 0.69 0.65/0.72", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "19 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".191"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 20 gauge needle\n\n**Nominal O.D. (mm):** 0.908\n\n**Nominal I.D. (mm):** 0.603\n\n**Wall thickness (mm):** 0.152\n\n**Dead volume (uL per 25.4 mm):** 7.255 \u00b5L/25.4 mm\n\n> 20 gauge needle | 0.908 | 0.603 | 0.152 | 7.255 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "7.255 \u00b5L/25.4 mm", "file": "20-gauge-needle.md", "gauge_number": "20 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "20-gauge-needle", "inner_diameter_mm": "0.603", "outer_diameter_mm": "0.908", "source_quote": "20 gauge needle | 0.908 | 0.603 | 0.152 | 7.255 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "20 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 20 RW\n\n**Nominal O.D. (mm):** 0.91\n\n**Nominal I.D. (mm):** 0.61\n\n**Wall thickness (mm):** .152\n\n> 20 RW 0.91 0.90/0.91 .152 0.61 0.58/0.62\n\nSource: \n", "file": "20-rw.md", "gauge_number": "20 RW", "generated": true, "harvested": "2026-08-27", "id": "20-rw", "inner_diameter_mm": "0.61", "outer_diameter_mm": "0.91", "source_quote": "20 RW 0.91 0.90/0.91 .152 0.61 0.58/0.62", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "20 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 21 gauge needle\n\n**Nominal O.D. (mm):** 0.819\n\n**Nominal I.D. (mm):** 0.514\n\n**Wall thickness (mm):** 0.152\n\n**Dead volume (uL per 25.4 mm):** 5.271 \u00b5L/25.4 mm\n\n> 21 gauge needle | 0.819 | 0.514 | 0.152 | 5.271 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "5.271 \u00b5L/25.4 mm", "file": "21-gauge-needle.md", "gauge_number": "21 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "21-gauge-needle", "inner_diameter_mm": "0.514", "outer_diameter_mm": "0.819", "source_quote": "21 gauge needle | 0.819 | 0.514 | 0.152 | 5.271 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "21 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 21 RW\n\n**Nominal O.D. (mm):** 0.81\n\n**Nominal I.D. (mm):** 0.51\n\n**Wall thickness (mm):** .152\n\n> 21 RW 0.81 0.81/0.83 .152 0.51 0.50/0.53\n\nSource: \n", "file": "21-rw.md", "gauge_number": "21 RW", "generated": true, "harvested": "2026-08-27", "id": "21-rw", "inner_diameter_mm": "0.51", "outer_diameter_mm": "0.81", "source_quote": "21 RW 0.81 0.81/0.83 .152 0.51 0.50/0.53", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "21 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 22 gauge needle\n\n**Nominal O.D. (mm):** 0.718\n\n**Nominal I.D. (mm):** 0.413\n\n**Wall thickness (mm):** 0.152\n\n**Dead volume (uL per 25.4 mm):** 3.403 \u00b5L/25.4 mm\n\n> 22 gauge needle | 0.718 | 0.413 | 0.152 | 3.403 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "3.403 \u00b5L/25.4 mm", "file": "22-gauge-needle.md", "gauge_number": "22 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "22-gauge-needle", "inner_diameter_mm": "0.413", "outer_diameter_mm": "0.718", "source_quote": "22 gauge needle | 0.718 | 0.413 | 0.152 | 3.403 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "22 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 22 RW\n\n**Nominal O.D. (mm):** 0.71\n\n**Nominal I.D. (mm):** 0.41\n\n**Wall thickness (mm):** .152\n\n> 22 RW 0.71 0.71/0.72 .152 0.41 0.39/0.43\n\nSource: \n", "file": "22-rw.md", "gauge_number": "22 RW", "generated": true, "harvested": "2026-08-27", "id": "22-rw", "inner_diameter_mm": "0.41", "outer_diameter_mm": "0.71", "source_quote": "22 RW 0.71 0.71/0.72 .152 0.41 0.39/0.43", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "22 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 22s gauge needle\n\n**Nominal O.D. (mm):** 0.718\n\n**Nominal I.D. (mm):** 0.152\n\n**Wall thickness (mm):** 0.279\n\n> 22s gauge needle | 0.718 | 0.152 | 0.279\n\nSource: \n", "file": "22s-gauge-needle.md", "gauge_number": "22s gauge needle", "generated": true, "harvested": "2026-08-27", "id": "22s-gauge-needle", "inner_diameter_mm": "0.152", "outer_diameter_mm": "0.718", "source_quote": "22s gauge needle | 0.718 | 0.152 | 0.279", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "22s gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.279"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 23 gauge needle\n\n**Nominal O.D. (mm):** 0.642\n\n**Nominal I.D. (mm):** 0.337\n\n**Wall thickness (mm):** 0.152\n\n**Dead volume (uL per 25.4 mm):** 2.266 \u00b5L/25.4 mm\n\n> 23 gauge needle | 0.642 | 0.337 | 0.152 | 2.266 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "2.266 \u00b5L/25.4 mm", "file": "23-gauge-needle.md", "gauge_number": "23 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "23-gauge-needle", "inner_diameter_mm": "0.337", "outer_diameter_mm": "0.642", "source_quote": "23 gauge needle | 0.642 | 0.337 | 0.152 | 2.266 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "23 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 23 RW\n\n**Nominal O.D. (mm):** 0.64\n\n**Nominal I.D. (mm):** 0.33\n\n**Wall thickness (mm):** .152\n\n> 23 RW 0.64 0.64/0.65 .152 0.33 0.32/0.36\n\nSource: \n", "file": "23-rw.md", "gauge_number": "23 RW", "generated": true, "harvested": "2026-08-27", "id": "23-rw", "inner_diameter_mm": "0.33", "outer_diameter_mm": "0.64", "source_quote": "23 RW 0.64 0.64/0.65 .152 0.33 0.32/0.36", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "23 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".152"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 23s gauge needle\n\n**Nominal O.D. (mm):** 0.642\n\n**Nominal I.D. (mm):** 0.116\n\n**Wall thickness (mm):** 0.267\n\n**Dead volume (uL per 25.4 mm):** 0.268 \u00b5L/25.4 mm\n\n> 23s gauge needle | 0.642 | 0.116 | 0.267 | 0.268 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.268 \u00b5L/25.4 mm", "file": "23s-gauge-needle.md", "gauge_number": "23s gauge needle", "generated": true, "harvested": "2026-08-27", "id": "23s-gauge-needle", "inner_diameter_mm": "0.116", "outer_diameter_mm": "0.642", "source_quote": "23s gauge needle | 0.642 | 0.116 | 0.267 | 0.268 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "23s gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.267"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 24 gauge needle\n\n**Nominal O.D. (mm):** 0.566\n\n**Nominal I.D. (mm):** 0.311\n\n**Wall thickness (mm):** 0.127\n\n**Dead volume (uL per 25.4 mm):** 1.93 \u00b5L/25.4 mm\n\n> 24 gauge needle | 0.566 | 0.311 | 0.127 | 1.93 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "1.93 \u00b5L/25.4 mm", "file": "24-gauge-needle.md", "gauge_number": "24 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "24-gauge-needle", "inner_diameter_mm": "0.311", "outer_diameter_mm": "0.566", "source_quote": "24 gauge needle | 0.566 | 0.311 | 0.127 | 1.93 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "24 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.127"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 24 RW\n\n**Nominal O.D. (mm):** 0.56\n\n**Nominal I.D. (mm):** 0.31\n\n**Wall thickness (mm):** .127\n\n> 24 RW 0.56 0.56/0.57 .127 0.31 0.29/0.33\n\nSource: \n", "file": "24-rw.md", "gauge_number": "24 RW", "generated": true, "harvested": "2026-08-27", "id": "24-rw", "inner_diameter_mm": "0.31", "outer_diameter_mm": "0.56", "source_quote": "24 RW 0.56 0.56/0.57 .127 0.31 0.29/0.33", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "24 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".127"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 25 gauge needle\n\n**Nominal O.D. (mm):** 0.515\n\n**Nominal I.D. (mm):** 0.26\n\n**Wall thickness (mm):** 0.127\n\n**Dead volume (uL per 25.4 mm):** 1.349 \u00b5L/25.4 mm\n\n> 25 gauge needle | 0.515 | 0.26 | 0.127 | 1.349 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "1.349 \u00b5L/25.4 mm", "file": "25-gauge-needle.md", "gauge_number": "25 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "25-gauge-needle", "inner_diameter_mm": "0.26", "outer_diameter_mm": "0.515", "source_quote": "25 gauge needle | 0.515 | 0.26 | 0.127 | 1.349 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "25 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.127"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 25 RW\n\n**Nominal O.D. (mm):** 0.51\n\n**Nominal I.D. (mm):** 0.25\n\n**Wall thickness (mm):** .127\n\n> 25 RW 0.51 0.51/0.52 .127 0.25 0.24/0.28\n\nSource: \n", "file": "25-rw.md", "gauge_number": "25 RW", "generated": true, "harvested": "2026-08-27", "id": "25-rw", "inner_diameter_mm": "0.25", "outer_diameter_mm": "0.51", "source_quote": "25 RW 0.51 0.51/0.52 .127 0.25 0.24/0.28", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "25 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".127"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 25s gauge needle\n\n**Nominal O.D. (mm):** 0.515\n\n**Nominal I.D. (mm):** 0.153\n\n**Wall thickness (mm):** 0.178\n\n**Dead volume (uL per 25.4 mm):** 0.464 \u00b5L/25.4 mm\n\n> 25s gauge needle | 0.515 | 0.153 | 0.178 | 0.464 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.464 \u00b5L/25.4 mm", "file": "25s-gauge-needle.md", "gauge_number": "25s gauge needle", "generated": true, "harvested": "2026-08-27", "id": "25s-gauge-needle", "inner_diameter_mm": "0.153", "outer_diameter_mm": "0.515", "source_quote": "25s gauge needle | 0.515 | 0.153 | 0.178 | 0.464 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "25s gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.178"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 26 gauge needle\n\n**Nominal O.D. (mm):** 0.464\n\n**Nominal I.D. (mm):** 0.26\n\n**Wall thickness (mm):** 0.102\n\n**Dead volume (uL per 25.4 mm):** 1.349 \u00b5L/25.4 mm\n\n> 26 gauge needle | 0.464 | 0.26 | 0.102 | 1.349 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "1.349 \u00b5L/25.4 mm", "file": "26-gauge-needle.md", "gauge_number": "26 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "26-gauge-needle", "inner_diameter_mm": "0.26", "outer_diameter_mm": "0.464", "source_quote": "26 gauge needle | 0.464 | 0.26 | 0.102 | 1.349 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "26 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.102"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 26 RW\n\n**Nominal O.D. (mm):** 0.46\n\n**Nominal I.D. (mm):** 0.25\n\n**Wall thickness (mm):** .102\n\n> 26 RW 0.46 0.46/0.47 .102 0.25 0.24/0.28\n\nSource: \n", "file": "26-rw.md", "gauge_number": "26 RW", "generated": true, "harvested": "2026-08-27", "id": "26-rw", "inner_diameter_mm": "0.25", "outer_diameter_mm": "0.46", "source_quote": "26 RW 0.46 0.46/0.47 .102 0.25 0.24/0.28", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "26 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".102"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 26s gauge needle\n\n**Nominal O.D. (mm):** 0.474\n\n**Nominal I.D. (mm):** 0.127\n\n**Wall thickness (mm):** 0.178\n\n**Dead volume (uL per 25.4 mm):** 0.322 \u00b5L/25.4 mm\n\n> 26s gauge needle | 0.474 | 0.127 | 0.178 | 0.322 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.322 \u00b5L/25.4 mm", "file": "26s-gauge-needle.md", "gauge_number": "26s gauge needle", "generated": true, "harvested": "2026-08-27", "id": "26s-gauge-needle", "inner_diameter_mm": "0.127", "outer_diameter_mm": "0.474", "source_quote": "26s gauge needle | 0.474 | 0.127 | 0.178 | 0.322 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "26s gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.178"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 27 gauge needle\n\n**Nominal O.D. (mm):** 0.413\n\n**Nominal I.D. (mm):** 0.21\n\n**Wall thickness (mm):** 0.102\n\n**Dead volume (uL per 25.4 mm):** 0.876 \u00b5L/25.4 mm\n\n> 27 gauge needle | 0.413 | 0.21 | 0.102 | 0.876 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.876 \u00b5L/25.4 mm", "file": "27-gauge-needle.md", "gauge_number": "27 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "27-gauge-needle", "inner_diameter_mm": "0.21", "outer_diameter_mm": "0.413", "source_quote": "27 gauge needle | 0.413 | 0.21 | 0.102 | 0.876 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "27 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.102"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 27 RW\n\n**Nominal O.D. (mm):** 0.41\n\n**Nominal I.D. (mm):** 0.20\n\n**Wall thickness (mm):** .102\n\n> 27 RW 0.41 0.41/0.42 .102 0.20 0.19/0.23\n\nSource: \n", "file": "27-rw.md", "gauge_number": "27 RW", "generated": true, "harvested": "2026-08-27", "id": "27-rw", "inner_diameter_mm": "0.20", "outer_diameter_mm": "0.41", "source_quote": "27 RW 0.41 0.41/0.42 .102 0.20 0.19/0.23", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "27 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".102"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 28 gauge needle\n\n**Nominal O.D. (mm):** 0.362\n\n**Nominal I.D. (mm):** 0.184\n\n**Wall thickness (mm):** 0.089\n\n**Dead volume (uL per 25.4 mm):** 0.675 \u00b5L/25.4 mm\n\n> 28 gauge needle | 0.362 | 0.184 | 0.089 | 0.675 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.675 \u00b5L/25.4 mm", "file": "28-gauge-needle.md", "gauge_number": "28 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "28-gauge-needle", "inner_diameter_mm": "0.184", "outer_diameter_mm": "0.362", "source_quote": "28 gauge needle | 0.362 | 0.184 | 0.089 | 0.675 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "28 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.089"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 29 gauge needle\n\n**Nominal O.D. (mm):** 0.337\n\n**Nominal I.D. (mm):** 0.184\n\n**Wall thickness (mm):** 0.076\n\n**Dead volume (uL per 25.4 mm):** 0.675 \u00b5L/25.4mm\n\n> 29 gauge needle | 0.337 | 0.184 | 0.076 | 0.675 \u00b5L/25.4mm\n\nSource: \n", "dead_volume": "0.675 \u00b5L/25.4mm", "file": "29-gauge-needle.md", "gauge_number": "29 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "29-gauge-needle", "inner_diameter_mm": "0.184", "outer_diameter_mm": "0.337", "source_quote": "29 gauge needle | 0.337 | 0.184 | 0.076 | 0.675 \u00b5L/25.4mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "29 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.076"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 30 gauge needle\n\n**Nominal O.D. (mm):** 0.312\n\n**Nominal I.D. (mm):** 0.159\n\n**Wall thickness (mm):** 0.076\n\n**Dead volume (uL per 25.4 mm):** 0.504 \u00b5L/25.4 mm\n\n> 30 gauge needle | 0.312 | 0.159 | 0.076 | 0.504 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.504 \u00b5L/25.4 mm", "file": "30-gauge-needle.md", "gauge_number": "30 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "30-gauge-needle", "inner_diameter_mm": "0.159", "outer_diameter_mm": "0.312", "source_quote": "30 gauge needle | 0.312 | 0.159 | 0.076 | 0.504 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "30 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.076"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 31 gauge needle\n\n**Nominal O.D. (mm):** 0.261\n\n**Nominal I.D. (mm):** 0.133\n\n**Wall thickness (mm):** 0.064\n\n**Dead volume (uL per 25.4 mm):** 0.353 \u00b5L/25.4 mm\n\n> 31 gauge needle | 0.261 | 0.133 | 0.064 | 0.353 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.353 \u00b5L/25.4 mm", "file": "31-gauge-needle.md", "gauge_number": "31 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "31-gauge-needle", "inner_diameter_mm": "0.133", "outer_diameter_mm": "0.261", "source_quote": "31 gauge needle | 0.261 | 0.133 | 0.064 | 0.353 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "31 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.064"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 32 gauge needle\n\n**Nominal O.D. (mm):** 0.235\n\n**Nominal I.D. (mm):** 0.108\n\n**Wall thickness (mm):** 0.064\n\n**Dead volume (uL per 25.4 mm):** 0.233 \u00b5L/25.4 mm\n\n> 32 gauge needle | 0.235 | 0.108 | 0.064 | 0.233 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.233 \u00b5L/25.4 mm", "file": "32-gauge-needle.md", "gauge_number": "32 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "32-gauge-needle", "inner_diameter_mm": "0.108", "outer_diameter_mm": "0.235", "source_quote": "32 gauge needle | 0.235 | 0.108 | 0.064 | 0.233 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "32 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.064"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 33 gauge needle\n\n**Nominal O.D. (mm):** 0.21\n\n**Nominal I.D. (mm):** 0.108\n\n**Wall thickness (mm):** 0.051\n\n**Dead volume (uL per 25.4 mm):** 0.233 \u00b5L/25.4 mm\n\n> 33 gauge needle | 0.21 | 0.108 | 0.051 | 0.233 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.233 \u00b5L/25.4 mm", "file": "33-gauge-needle.md", "gauge_number": "33 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "33-gauge-needle", "inner_diameter_mm": "0.108", "outer_diameter_mm": "0.21", "source_quote": "33 gauge needle | 0.21 | 0.108 | 0.051 | 0.233 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "33 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.051"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 34 gauge needle\n\n**Nominal O.D. (mm):** 0.159\n\n**Nominal I.D. (mm):** 0.051\n\n**Wall thickness (mm):** 0.051\n\n**Dead volume (uL per 25.4 mm):** 0.052 \u00b5L/25.4 mm\n\n> 34 gauge needle | 0.159 | 0.051 | 0.051 | 0.052 \u00b5L/25.4 mm\n\nSource: \n", "dead_volume": "0.052 \u00b5L/25.4 mm", "file": "34-gauge-needle.md", "gauge_number": "34 gauge needle", "generated": true, "harvested": "2026-08-27", "id": "34-gauge-needle", "inner_diameter_mm": "0.051", "outer_diameter_mm": "0.159", "source_quote": "34 gauge needle | 0.159 | 0.051 | 0.051 | 0.052 \u00b5L/25.4 mm", "sources": ["https://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart"], "stale_after": "2029-08-26", "title": "34 gauge needle \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": "0.051"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 6 RW\n\n**Nominal O.D. (mm):** 5.15\n\n**Nominal I.D. (mm):** 4.39\n\n**Wall thickness (mm):** .381\n\n> 6 RW 5.15 5.13/5.18 .381 4.39 4.32/4.47\n\nSource: \n", "file": "6-rw.md", "gauge_number": "6 RW", "generated": true, "harvested": "2026-08-27", "id": "6-rw", "inner_diameter_mm": "4.39", "outer_diameter_mm": "5.15", "source_quote": "6 RW 5.15 5.13/5.18 .381 4.39 4.32/4.47", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "6 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".381"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 7 RW\n\n**Nominal O.D. (mm):** 4.57\n\n**Nominal I.D. (mm):** 3.81\n\n**Wall thickness (mm):** .381\n\n> 7 RW 4.57 4.57/4.60 .381 3.81 3.73/3.89\n\nSource: \n", "file": "7-rw.md", "gauge_number": "7 RW", "generated": true, "harvested": "2026-08-27", "id": "7-rw", "inner_diameter_mm": "3.81", "outer_diameter_mm": "4.57", "source_quote": "7 RW 4.57 4.57/4.60 .381 3.81 3.73/3.89", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "7 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".381"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 8 RW\n\n**Nominal O.D. (mm):** 4.19\n\n**Nominal I.D. (mm):** 3.43\n\n**Wall thickness (mm):** .381\n\n> 8 RW 4.19 4.17/4.22 .381 3.43 3.35/3.51\n\nSource: \n", "file": "8-rw.md", "gauge_number": "8 RW", "generated": true, "harvested": "2026-08-27", "id": "8-rw", "inner_diameter_mm": "3.43", "outer_diameter_mm": "4.19", "source_quote": "8 RW 4.19 4.17/4.22 .381 3.43 3.35/3.51", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "8 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".381"} {"asset": "syringe-needle-gauge-dimensions", "body": "**Gauge number:** 9 RW\n\n**Nominal O.D. (mm):** 3.76\n\n**Nominal I.D. (mm):** 3.00\n\n**Wall thickness (mm):** .381\n\n> 9 RW 3.76 3.74/3.78 .381 3.00 2.92/3.07\n\nSource: \n", "file": "9-rw.md", "gauge_number": "9 RW", "generated": true, "harvested": "2026-08-27", "id": "9-rw", "inner_diameter_mm": "3.00", "outer_diameter_mm": "3.76", "source_quote": "9 RW 3.76 3.74/3.78 .381 3.00 2.92/3.07", "sources": ["https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf"], "stale_after": "2029-08-26", "title": "9 RW \u2014 Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)", "type": "tolerance", "verified": true, "wall_thickness_mm": ".381"}