NPSM thread gauge

NPSM thread gages manufacturer / supplier

NPSM thread ring & plug gauges supplier

Ring gages used to check external thread, plug gages used to check internal thread.

NPSM thread gauge is American Standard Straight Pipe Thread for Mechanical joints gauges

NPSM thread is one kind of National Non-sealed Pipe Thread.

Ref. ANSI/ASME B1.20.1

We have as below sizes’s NPSM ring and plug gauges in stock

1/8″-27 NPSM 1/4″-18 NPSM 3/8″-18 NPSM 1/2″-14 NPSM
3/4″-14 NPSM 1″-11.5 NPSM 1 1/4″-11.5 NPSM 1 1/2″-11.5 NPSM
2″-11.5 NPSM 2 1/2″-8 NPSM 3″-8 NPSM 3 1/2″-8 NPSM
4″-8 NPSM 5″-8 NPSM 6″-8 NPSM

All our gauges can be sent to third party calibration labs to get calibration certificates.

We also can provide NPSL, NPTR, NPSH, NH, and NHR etc thread gauges.


We accept payment of T/T (bank transfer), Paypal.We 100% be sure gauges’s quality, when clients received goods, if found any not well, clients can give back to us, we will undertake all the loss including shipping cost .

We usually send goods by express, DHL or UPS.