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
