18 gauge needle
What is the nominal o.d. (mm) for 18 gauge needle?
For 18 gauge needle, nominal o.d. (mm) is 1.27; nominal i.d. (mm) is 0.838; wall thickness (mm) is 0.216; dead volume (ul per 25.4 mm) is 14.011 µL/25.4 mm, verified against its source on 2026-08-27.
18 gauge needle | 1.27 | 0.838 | 0.216 | 14.011 µL/25.4 mm
— hamiltoncompany.com, retrieved 2026-08-27
- Gauge number
- 18 gauge needle verified
- Nominal O.D. (mm)
- 1.27 verified
- Nominal I.D. (mm)
- 0.838 verified
- Wall thickness (mm)
- 0.216 verified
- Dead volume (uL per 25.4 mm)
- 14.011 µL/25.4 mm verified
Source
- hamiltoncompany.comhttps://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart