Asimeto Ring Thread Gauge (GO) - Metric - Right Hand - 6g - M42 x 4.5The Asimeto 683 Series Ring Thread Gauge GO is a precision tool designed for quality control professionals working with metric coarse 6g threads. Specifically calibrated for right hand M42 x 4. 5 threads, it verifies the upper size limit to ensure parts stay within tolerance and assemble reliably. Gauging Type: GO ring gauge that checks maximum material condition to confirm the part remains within the upper allowable size Thread Specification: Metric