NPT Thread Gauges

NPT Thread Gauges



Specification
  • ANSI/ ASME B1.20.1 : 1983 for Basic Type Gauges & American Handbook H-28 Part II : 1957 for Step Limit type.
Manufacturing Range :
  • Thread Plugs, Thread Rings, Check Plugs & Wear Check Plugs of Diameter from 1/16" to 12" in both Basic & Step Limit Design.
DIA IN INCH TPI Type of Thread Gauges used
1/1, 6, 1/8 27 Taper Plug Gauges, L1 Basic
L1 Step Limit
Plain Taper Plugs
to check Taper Bore / Minor Diameter
of Internal Threads.
Taper Ring Gauges L1 Basic
L1 Step Limit
Master Plug/ Check Plugs/ Wear Check
Plugs to check
Ring Gauges.
¼, 3/8 18
½, ¾ 14
1, 1.1/4, 1.1/2, 2 11.5
2.1/2, 3, 3.1/2,4
4, 5, 6, 8,10,12
8
Rings Diameter above 8" are not in Mfg. Range