Types of threads - Videos

GSG Distributor Portal - Thread Types
Variable Thread Gages

The Tri-Roll not only indicates whether a threaded part is within assigned limits, it also shows the exact position of the pitch diameter within a tolerance range. In addition, the Tri-Roll gages will check size and out of roundness of plain cylindrical parts.


AGD thread rings comply with ASME/ANSI B47.1 gage blank standard.
Sizes below 1/4 (M6) are counterbored to hold specific length.

True Round Thread Rings

The "True Round" sets round and stays round through all adjustments due to eccentric design and opposing pressures of the adjusting and locking mechanisms.
Color coded for easy identification of the Go and Nogo gage.
The aluminum body makes large gage rings light weight and easier to use.
The GSG "Southern Style" thread ring features the unique "Automatic Helical Adjustment". The Helix Path of the thread along the line of adjustment remains true and in alignment throughout the life of the gage.

Step Plug Gages

Important for sealing applications in plumbing applications, the GSG step plug seminar explains how our step plugs gages are utilized.

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