Asimeto Ring Thread Gauge (NoGo) - Metric - Right Hand - 6g - M50 x 2The Asimeto Ring Thread Gauge (NoGo) is a precision tool designed for quality control and fastener validation, specifically for metric threads. Built for machinists, inspectors, and assembly technicians, it helps confirm that external threads stay within the strict 6g tolerance class. 6g Tolerance Class: Precisely calibrated to meet the 6g standard, ensuring accurate measurement of the thread pitch diameter for metric threads. NoGo Designation: NOGO