Thread plug gages are used to check an internal threaded hole.
Working thread plugs are to be used in an internally threaded hole and are not to be used to check a
ring gage. The part being checked is generally acceptable when the NOGO work plugs does not enter more
than 1 ½ to 3 turns dependent upon customer specifications and the GO work plug freely enters the
threaded hole in its entire length.
The most common thread plug classifications are:
- reversied thread plug gage:
The reversible thread plug gage also consists of a GO and NOGO member(s). Both members are straight
and afford the gage user double the life by simply reversing the gage member(s), turning the worn
portion into the handle.
Each end of the handle is color coded, green for Go and red for Nogo.
- taperlock thread plug gage:
Gage members have tapered shanks which fit corresponding handles.
The taperlock style consists of a GO and/or NOGO member(s). The GO member is longer than the NOGO and
has a chip groove (in larger sizes) which not only adds to ease of identification but also assists in
clearing obstructions.
- trilock thread plug gage:
Consisting of a GO and/or NOGO member(s), the trilock has a bolt fastening system to support the size
and weight. A chip groove is provided on the Go member for ease of identification and clearing
obstructions.
|
