A Thread Plug GO gage checks the minimum major diameter and the minimum pitch diameter size in a part, the NOGO checks for the hole not to exceed the maximum pitch diameter size in a part. All GSG Thread Plug Gages are manufactured to ASME/ANSI B1.2 or B1.16M. All thread plug gages are made of oil hardened Tool Steel.
Shown is a Go and Nogo Truncated (Master) Set Plug.
Set Plugs are used to set thread rings for proper fit and feel and inspect ring for wear.
Set Plugs have a common pitch diameter the full thread length of the Go or Nogo section. The crest of the thread is truncated for the first half of the set plug and full form the remaining length.
