Hemco Gage is the largest chrome-plated gauge manufacturer in the United States. The service life of the chrome-plated gauge is 4 times longer than that of the gauge made of ordinary steel tool steel. At the same time, hemco gage is one of the two manufacturers in the United States that can produce oil calibration gauges, and its manufacturing and testing capabilities are beyond doubt. NPT stands for National (American) Pipe Thread, which belongs to the United States standard 60 degree taper Pipe Thread. According to different testing parameters, NPT thread gauge can be divided into L1, L2, L3 and 6 steps, especially a 6-step smooth gauge, which is relatively rare in China.

The model of NPT is as follows:

3/8-18 NPT L1, L2, L3, 6 step light gauge

1/2-14 NPT L1

3/4-14 NPT L1

1-11 1/2 NPT L1

1 1/4-11 1/2 NPT L1

1 1/2-11 1/2 NPT L1

2-11 1/2 NPT L1