The 4 best known pipe thread types at a glance ( NPT, NPTF, BSP, BSPT ) - Threading tools guide

Pipe threads are screwed connections which are particularly used in gas and water installations. In Europe, British Whitworth pipe threads (BSP and BSPT)

Identifying threads and connectors

How to Identify a Thread Type, NPT, PT, BSP

Painful lesson of the day: NPT vs. BSPT – Sunbeam Alpine Blog

Determine pipe thread sizes

NPT & BSPT Thread - QC Hydraulics

BSPT & BSPP Thread Guide & Chart - RYCO Hydraulics

Thread Identification Guide Trimantec, PDF, Mechanical Engineering

NPT, NPTF, BSPP and BSPT

Thread Identification Guide Trimantec, PDF, Metalworking

The 4 best known pipe thread types at a glance ( NPT, NPTF, BSP, BSPT ) - Threading tools guide