UN Thread Gauges
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Tooling Supplier

for the UK & Ireland

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UN Thread Gauges

UN precision thread gauges from German manufacturer JBO (Johs Boss) are Europe’s largest manufacturer and stockist of precision thread gauges.

The UN ‘Special’ range includes go and no-go metric gauges from 1/4" UNS to 2" UN.in tolerances including: 2B & 2A. All gauges are available with UKAS calibration.