Glastonbury Southern Gage is known as a leader in the manufacture of thread, variable thread, cylindrical, and spindle gages. Each gage is the finest available because we use only superb quality tool steels, and manufacturing and quality control processes that ensure the best value. Plug and ring gages are available in a wide range of sizes, in classes Z, Y, X, XX, XXX and a choice of materials to suit your application.
GSG is a world leader in thread gage manufacturing with straight gages, taper gages, and custom threads.
Precision ground and lapped Go/NoGO and master cylindricals in steel, chrome, and carbide make GSG a quality manufacturer.
GSG produces CMM and tool masters as well for calibrating your tools in house.