1. NPTF taper thread joint
This is a dry sealing thread; It is a national taper pipe thread for conveying fuel, which can be used for both external thread end joints and threaded end joints. NPTF external threads can be matched with NPTF, NPSF or NPSM threads. NPTF pipe joint is similar to BSPT pipe joint, but it can not be exchanged with each other. The pitch of most threads is different and the profile angle is 60 degree , while the profile angle of BSPT thread is 55 degree .
