Working Thread Plug Gages

Product Details

Working thread plug gages are used to insure the threaded hole complies to specification, normally either a 2B or 3B classification. The part being checked is acceptable when the Not Go plug does not enter more than 3 turns and the Go plug freely enters the entire length. For working thread plug gages, the Go member is longer than the Not Go member, and normally is assembled with a double end handle for ease of use.

Working thread plug gages are furnished with Standard class “X” industry tolerance
Taperlock style has a Go and/or Not Go member(s) with the Go member being longer and having a chip groove (in larger sizes)
Reversible thread plug gage consists of a Go and Not Go member(s) with both members being straight
Trilock design consists of a Go and/or Not Go member(s) with a bolt fastening system to support the size and weight Design is best suited for large size (1-1/2 inches and up) with a chip groove on the Go member