Vermont Gage 1-1 4-18 UNEF-2A Thread Ring Gage

The Vermont Gage 1-1/4-18 UNEF-2A Thread Ring Gage Set is a precision inspection tool designed to verify external thread dimensions and pitch diameter for 1-1/4"-18 UNEF Class 2A components. The set includes GO and NO-GO ring gages with a GO pitch diameter of 1.2124 inches, calibrated to the Unified National Extra Fine (UNEF) standard. Built from precision hardened tool steel and manufactured to ANSI/ASME thread gaging standards, it provides reliable checks of size, pitch, and class for external threads. Designed for external thread inspection, this gage supports production inspection, calibration tasks, and routine quality control in manufacturing environments. Commonly used in machine shops, calibration laboratories, aerospace and automotive production, and other industrial settings, it helps ensure parts meet 2A requirements before assembly and in-process checks.