NPT Thread Ring Gauge   NPTF  Thread Plug Gauge

  Standard :FED-STD-H28/8.7

Including of The Metric Plug  and Ring Gauges, American Plug and Ring Gauges, PlainPlug and Ring Gauges, Petroleum Tubing Gauges, Trapeziform plug and ring Gauges

Plug gauge for the plain limiting hole(Plug Gauge)

 We can make all kinds of types Go & No go Gauge according to  customer's demand.