- FSTNR - Fastener
- ANTP - American National Taper Pipe
- ANPT - Aeronautical National Pipe Taper
- ANS - American National Standard replaced with UNS
- BA - British Association
- BSF - British Standard Fine
- BSP - British Standard Pipe
- BSW - British Standard Whitworth
- ISO - International Organization for Standardization
- NPT - National Pipe Thread Tapered Thread
- NPTF - National Pipe Taper Fuel - Dryseal
- UNS - Unified National Standard
- USS - United States Standard
- UTS - Unified Thread Standard
