Plain Plug Gauges

S.G. Prittie manufactures an extensive range of plain plug gauges to Australian and International Standards. Tru-size gauges are assembled from stock X class pins providing prompt delivery. Larger Taper-lock design are ground from hardened blanks held in stock. Our largest range, Tri-lock are made to order. Special and extra long gauges are also available as made to order gauges. All of our gauges are made from hardened tool steel to ensure long life and are supplied with a manufacturers certificate of conformance (COC).

Product options

Go gauge with step for min. depth or 2 steps for max./min. applications
Nogo relief, diamond or flat
Extra length gauges or modified handles
Square or Rectangular gauges
NATA Calibration – ISO 17025
Storage case for a single gauge or for a gauge set

Applicable standards


Why this product is used

Plain plug gauges are an efficient way to check internal diameter conformance. Simply check that the Go gauge will engage the part to full depth and that the Nogo gauge will not enter. This condition indicates a conforming part.

  • Customisation

    Customisation is offered on most gauges. We can add a new feature to a standard gauge, manufacture a revised design based on a standard gauge, or design a new gauge to suit your application.

  • Support

    We offer design and technical support for all our gauges, as well as support for measurement and calibration inquiries. Contact us via phone or email.

  • Delivery

    We offer express or economy delivery and can send products to local, interstate and overseas locations. We’re also happy to use your own delivery supplier.

  • Manufacturing

    We are an Australian business located in Airport West Victoria. Quality is a priority and we have ISO 9001 and ISO 17025 management systems in place.


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Gauge Design Range in stock Increments Stocked
Pin gauge - Tru-size 0.30 – 16.10 mm 0.0025 mm
Taper-lock 3.0 – 76.0 mm Made to order
Tri-lock 63 – 250 mm Made to order


How often do I need to calibrate my gauge?

There is no fixed time, calibration frequency is based on how often the gauge is used and the conditions that the gauge is exposed to. Frequent use and abrasive materials will require more frequent calibration, low use in a clean environment will allow less frequent calibration. Usually the user determines the calibration frequency.

Can a gauge be made to my own specification?

Yes, we can design special pin gauges for your manufacturing process.

If you need assistance selecting the correct gauge or have technical questions please contact us.

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