Trilock type plug gauges are essentially reversible gauges without the signature GO/NO-GO colour coding. Simply remove the 3 bolts, reverse your gauging member and re-fasten. Trilock are suitable for big diameter plug gauges.


Diameter Range:

  • Metric: 19 – 170mm
  • Imperial: 0.8 – 6.5 inch.

Supplied As Either:

  • Double Ended.
  • Single Ended.
  • Member Only.

Available Choice of Materials:

  • Tool Steel.
  • Tungsten Carbide Ceramic.

Standard Gauge Tolerance:

  • BS 969 – 1982.
    (please advise alternative tolerance if required)
  • SAC Singlas calibration certificate available.

Laser Engraving:

  • GO/NO-GO Sizes will be stated as standard.
  • Additional text available @ no extra cost.
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