Tapered Pipe Threads and Fittings: Making the Connection

NPT, National Pipe Taper (American) and BSPT (British standard Pipe Taper) are tapered pipe thread standards. Male and female tapered pipe threads wedge themselves together but need a sealant for a completely leak-free connection.

How to Determine Pipe Thread Type and Pipe Size – Fresh Water Systems

How to Easily Identify the Right Threaded Connection

BSPP, BSPT and NPT thread - TPMCSTEEL

National pipe thread - Wikipedia

Difference Between NPT and NPTF Threads - Compression Fitting to NPT

Npt Threaded Collection Discounts

How to Identification of BSPP,BSPT, NPT threads? - China Valve Manufacturer

Making NPT Connections

Camlock Threads