Precision
thread ring gauges

Available thread types

• M - ISO metric thread

• MF - ISO metric fine thread
  

• G - Whitworth pipe thread
  

• BSW - British Standard Whitworth thread

• BSF - British Standard Whitworth fine thread
  

• R - Tapered Whitworth pipe thread
  

• Pg - Steel conduit thread
  

• MF-EL - Electrical conduit thread
  

• UNC - Unified national coarse thread
  

• UNF - Unified national fine thread
  

• UNEF - Unified national extra fine thread
  

• UN/UNS - Unified national thread, Unified national special thread

• UNJC - UNJC Unified national coarse thread

• UNJF - UNJF Unified national fine thread
  

• NPT - American Standard taper pipe thread
  

• NPTF - American Standard taper pipe thread

• Tr - ISO metric trapezoidal thread