Can you use Bspt with BSPP?
Emily Wilson
Updated on April 27, 2026
.
Likewise, people ask, what is the difference between BSPP and BSPT?
BSPP is parallel thread/whitworth, BSPT, R and RC is taper thread, but RC is female BSPT thread. BSPP and BSPT (in most cases) have different threads per inch (TPI) (and consequently pitch). The male BSPT taper thread will mate with a female BSPT or BSPP thread, so this situation BSPT can fit BSPP.
Furthermore, what does BSPP thread mean? British Standard Pipe Parallel thread
Regarding this, is BSPP compatible with NPT?
BSPT equivalent is NPT and BSPP's equivalent is NPS. Never swap threads if it is a high pressure application. NPT/NPS and BSP threads are not compatible due to the differences in their thread forms, and not just the fact that most sizes have a different pitch.
How do I seal BSPP threads?
BSPT male threads seal against threads of fixed BSPT female. Contact is made on the flanks of the threads. Use of a thread sealant is recommended for BSPT male to BSPT female connections. Measure the BSPT male thread OD and female thread ID at the first full thread near the end of the fitting.
Related Question AnswersHow is Bspt measured?
To find the thread size:- 1) Measure the O.D (outer diameter) of the BSP thread.
- 2) Take the O.D measurement (in inches) and subtract 1/4 inch (. 25”).
- 1) Multiply 3.5 by 4 to get 14. This is the number of threads per inch.
- 2) Combine the thread size with the number of threads per inch and refer to.