Unified (UN) Threads
Metric (ISO) Threads
National Taper Pipe (NPT) Threads
Dryseal Pipe (NPTF) Threads
National Pipe Straight Fuel (NPSF)
British Standard Pipe (BSP) Threads
British Standard Pipe (BSP)(BSPP) Threads - Metric Shank
British Standard Pipe Taper (BSPT) Threads
British Standard Pipe Taper (BSPT) Threads - Metric Shank