NPT Pipe Thread Gages

Regal’s  plug and ring pipe thread gages are made from hardened tool steel  and conform to precise class X tolerances and ANSI  Standards. Pipe thread gages for NPT threads are available from 1/16-27 to 6”-8, NPTF and ANPT from 1/16-27 to 1 ½”- 11 1/2”. 

  • NPT thread gages are manufactured to specification of the Bureau of Standard Handbook H-28 and ANSI B21