Plug Gauges & Ring Gauges

Plug Gauges & Ring Gauges are the ideal tools for checking the integrity of internal threads to ensure they meet the exact standards required. Plug and ring gauges are mostly used as inspection tools. Browse our range of Plug Gauges & Ring Gauges, all are of the highest quality sourced from leading brands such as Volkel and available with calibration.

Plug Gauges

Go No-Go Plug Gauges are used to engage the internally threaded part with very little force. Smooth engagement is what you are looking for. There is no specification regarding torque or pressure for using thread plug gauges they are exclusively hand operated. However, its good practice to only turn the plug with 3 revolutions. Thread gauges will clean the threads of a nut but if it becomes jammed then you should stop turning as the nut has failed inspection.

Ring Gauges

No-Go Ring Gauges are used to engage a threaded part like a bolt. As per plug gauges, very little force should be used, smooth engagement only. Always make sure the ring gauge is calibrated prior to use with a thread gauge and limit the turns to 1.5 to 2 max.

Feature and Benefits

  • Easy to use
  • Marked with pitch diameter
  • Metric sizes
  • Accurate
  • Hand operated
  • Fast testing


Plug Gauges & Ring Gauges are used by engineers for inspection of threaded components, quality control, and calibration.

Why would you choose RS Components for Plug Gauges & Ring Gauges?

Our range of gauges has been selected for their high degree of accuracy, quality, and ease of use. We support engineers with products and technical information to ensure they have the ideal plug gauge & ring gauge solution.

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Viewing 61 - 64 of 64 products
Results per page
Description Price Plug/Ring Gauge Type Thread Size Pitch Diameter Tolerance Single or Double Ended Calibrated Imperial or Metric
RS Stock No. 189-3334
Mfr. Part No.16025 +Cal
Plug Go/No Go M12 x 1.75 1.75mm 6H Double PreCal Metric
RS Stock No. 189-3350
Mfr. Part No.16335 +Cal
Ring No Go Ring M5 x 0.8 0.8mm 6g - PreCal Metric
RS Stock No. 177-0522
Mfr. Part No.16196
Ring Go Ring M10 x 1.5 1.5mm 6g - - Metric
RS Stock No. 189-3349
Mfr. Part No.16192 +Cal
Ring Go Ring M6 x 1 1mm 6g - PreCal Metric