American Standard External Taper Pipe Threads

ANSI’s American National Standard Pipe Thread Standards regulate the formation and size of the screw threads on parts with straight or tapered threads.

Swagelok

All About Pipe and Hose Threads

NPTF - National Pipe Thread Fuel (Dryseal) Threads

Main differences between BSPP or Gas, BSPT and NPT threads

Pipe Taps Technical Information

External Pipe Thread Design, Specifications and NPT Pipe Thread

All About Pipe and Hose Threads

Product and Technical Support Resources

Unified Screw Threads: A New American Standard

Compression thread vs pipe thread - QC Hydraulics

How to judge the thread NPT/BSPP/BSPT