UN Thread Set Plugs
Set plug thread gages are used to calibrate working thread ring gages. The 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. Setting plugs are stocked in 2A & 3A (inch) Classes of fit. All thread gages are marked with nominal size, threads per inch (inch), class of fit, and pitch diameters.