# 16 RW — Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)

For 16 RW, nominal o.d. (mm) is 1.65; nominal i.d. (mm) is 1.19; wall thickness (mm) is .229, verified against its source on 2026-08-27.

- **Gauge number:** 16 RW _(verified: appears in the quote below)_
- **Nominal O.D. (mm):** 1.65 _(verified: appears in the quote below)_
- **Nominal I.D. (mm):** 1.19 _(verified: appears in the quote below)_
- **Wall thickness (mm):** .229 _(verified: appears in the quote below)_

## What the source says

> 16     RW   1.65   1.64/1.66   .229   1.19     1.16/1.23

## Source

- https://nesmalltube.com/wp-content/uploads/2025/06/Metric_Chart_Web.pdf

Last verified: 2026-08-27. Review by: 2029-08-26.
Part of [Hypodermic needle gauge dimensions (OD, ID, wall thickness, dead volume)](https://referencesource.org/syringe-needle-gauge-dimensions/).