NPT Thread Gauges

NPT THREADS are used in general purpose application of pipe assembly, where a pressure tight joint of pipes is made, by making the pipes wrench tight using a sealing compound.

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

NPT L2 gauges to check threads beyond L1 limit, i.e. up to L2 length for wrench fit, can be supplied on request.