G/R/RP-Withworth Thread (BSPP/BSPT) - Teesing
The most common types of Whitworth thread are:
- BSPP (G) – British Standard Pipe Parallel
- BSPT (R/Rp) – British Standard Tapered Pipe, for pipes and tapered thread
An appropriate sealing compound can be used in the thread to ensure a leakproof joint.If you have any questions please contact us or check out our fittings with BSPP/ BSPT (G) thread.
BSPP (G) Female and male thread are both parallel.
∅ | Drill ∅B | ∅ | TPI |
G 1/16 | 7,723 | 6,561 | 28 |
G 1/8 | 9,728 | 8,566 | 28 |
G 1/4 | 13,157 | 11,445 | 19 |
G 3/8 | 16,662 | 14,950 | 19 |
G 1/2 | 20,955 | 18,631 | 14 |
G 3/4 | 26,441 | 24,117 | 14 |
G 1 | 33,249 | 30,291 | 11 |
G 2 | 59,614 | 56,656 | 11 |
BSPT (R/Rp)Female thread is parallel and male thread is tapered.Female thread can also be tapered: Rc, but this is not common.
Male thread size (inch) | Female thread size (inch) | Major diameter (mm) | Minor diameter (mm) | TPI |
R 1/16 | Rp 1/16 | 7,723 | 6,490 | 28 |
R 1/8 | Rp 1/8 | 9,728 | 8,495 | 28 |
R 1/4 | Rp 1/4 | 13,157 | 11,341 | 19 |
R 3/8 | Rp 3/8 | 16,662 | 14,846 | 19 |
R 1/2 | Rp 1/2 | 20,955 | 18,489 | 14 |
R 3/4 | Rp 3/4 | 26,441 | 23,975 | 14 |
R 1 | Rp 1 | 33,249 | 30,111 | 11 |
G 2 | Rp 2 | 59,614 | 56,476 | 11 |
Any Questions?
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