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

Valve connections are governed by two different thread standards: British Standard Pipe (BSP) and National Pipe Thread (NPT). Which does your system require?

G Thread (BSP) to NPT (US Thread) Pipe Fitting Adapter with G Thread Bonded Washer Seal Included 1/2 MG x 1/2 FNPT 2 Pieces : : Home & Kitchen

BSP vs NPT campatibility - QC Hydraulics

The difference between NPT and BSP seals

3/8 FNPT x 3/8 BSPP Male - SS Adapter + Sealing Washer

Threaded Adaptors - PAAS

Understanding BSP, BSPP, and BSPT Threads - Hydraxio: China SS Hydraulic Fittings Manufacturer & Supplier

Hydraulic Fitting Thread Chart

What is BSP and NPT thread? - SAB spa

Main differences between BSPP or Gas, BSPT and NPT threads

British and Metric Sealing Methods