UNC and UNF thread gauges are available in left or right hand, in 2A and 2B tolerances. UNC (unified national coarse thread) and UNF (unified national fine thread) are to ANSI B1.1 standards. We can also offer UNJ or UNEF thread gauges on request.
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 piece should be accepted. The 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.
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.
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