thread_standard

• ISO Metric (M)
• BSP threads(G)
• Unified Thread Standard(UTS)
  • Unified Coarse (UNC)
  • Unified Fine (UNF)
  • Unified Extra Fine (UNEF)
  • Unified Special (UNS)
  • National pipe thread(NPT) Taper
    • NPT- National Pipe Thread Taper
    • FPT - female (internal) National Pipe Taper threads
    • MPT - male (external) National Pipe Taper threads
    • NPTF - Dryseal American National Standard Taper Pipe Thread (ANSI B1.20.3)
• British Standard Whitworth(BSW), and for other Whitworth threads including:
  • British Standard Fine (BSF)
  • Cycle Engineers' Institute (CEI)
  • British standard pipe thread(BSP)
• British Standard Pipe Taper (BSPT)
• British Association screw threads(BA)