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.

NITRA Pneumatics In Depth Pages: Thread Sizes

Pipe Thread Installation Torque Table Chart

ISM

Sealing Methods

The tapered pipe thread

Tapered Pipe Threads and Fittings: Making the Connection

BSP vs. NPT Fittings: Which Seal Do You Need?

Connection Types: American Connections

Types of Valve End Connections