9 RW

What is the nominal o.d. (mm) for 9 RW?

For 9 RW, nominal o.d. (mm) is 3.76; nominal i.d. (mm) is 3.00; wall thickness (mm) is .381, verified against its source on 2026-08-27.

9 RW 3.76 3.74/3.78 .381 3.00 2.92/3.07

— nesmalltube.com, retrieved 2026-08-27