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for the UK & Ireland

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NPT/NPTF Thread Gauges

NPT (national pipe taper) and NPTF (national pipe taper fine) thread gauges are available in right hand. 

For best quality practise, go and no-go thread gauges should be used together.  Go thread gauges are used for gauging the effective diameter of the thread. If the go thread gauge fits the thread, the work peice should be accepted. NPT no-go thread gauge is an oversized gauge also used for gauging the effective diameter of the thread.  If the no-go thread gauge fits the thread, the work piece should be rejected.   NPT thread gauges should only be inserted to the depth of the step on the gauge.

Our range of thread gauges are also available in TiCN coating and different tolerance levels (please contact us for prices).   UKAS calibration is available with a 5 day lead time.