R.

Meaning: 
Same as BSPT

The R thread is a designation for BSPT (British Standard Pipe Taper).  For example,

R1/4

refers to the threaded end of a fitting or pipe which is 1/4 inch trade size (not actually 0.25 inches), and having British Standard Tapered Pipe threads.

Last modified: 
Saturday, December 22, 2018 - 23:06