UN Trilock Thread Gages
Thread gages inspect the pitch diameter and the functional thread
for both internal and external threaded products. The trilock thread gages listed are made
to Class X tolerances per ANSI B1.2 (Unified inch screw threads). All thread gages
are supplied with a Certificate of Accuracy. Trilock work plugs are stocked in 2B &
3B (inch) classes of fit. Stocked trilock work plugs are chrome plated. All thread gages are marked
with nominal size, threads per inch (inch), class of fit, and pitch diameters.