31 gauge needle
What is the nominal o.d. (mm) for 31 gauge needle?
For 31 gauge needle, nominal o.d. (mm) is 0.261; nominal i.d. (mm) is 0.133; wall thickness (mm) is 0.064; dead volume (ul per 25.4 mm) is 0.353 µL/25.4 mm, verified against its source on 2026-08-27.
31 gauge needle | 0.261 | 0.133 | 0.064 | 0.353 µL/25.4 mm
— hamiltoncompany.com, retrieved 2026-08-27
- Gauge number
- 31 gauge needle verified
- Nominal O.D. (mm)
- 0.261 verified
- Nominal I.D. (mm)
- 0.133 verified
- Wall thickness (mm)
- 0.064 verified
- Dead volume (uL per 25.4 mm)
- 0.353 µL/25.4 mm verified
Source
- hamiltoncompany.comhttps://www.hamiltoncompany.com/laboratory-products/needles-knowledge/needle-gauge-chart