Leader Corporation, offers a complete line of AGD – American Gage Design, metric working thread plug gages in both taperlock and reversible styles. Thread plug gages are manufactured per ANSI/ASME B1.16M. Leader Corporation thread plug gages are manufactured to an X tolerance in 6H class of fit. Thread plug gages are available in coarse, fine and special pitch sizes. All standard thread plug gages are stocked in hard chrome coating which extends the wear life of the gage by more than a 100% thus providing dramatic savings in replacement costs. All Leader Corporation gages are manufactured to the high end of the tolerance to ensure longer gage life. Leader Corporation manufactures gages in carbide, ceramic and other types of specialty steels. Leader Corporation manufactures many types of special gages including pre-plates, multiple starts, special leads, acme threads, buttress threads, square threads, extra length thread gages, and custom gages to print. All thread plug gages are traceable to N.I.S.T.