Asimeto Ring Thread Gauge (GO) - Metric - Right Hand - 6g - M45 x 4.5The Asimeto 683 Series Go Ring Gauge is a precision tool designed for quality control and manufacturing teams working with metric coarse threads. Calibrated for M45 x 4. 5 right hand threads at 6g, it reliably verifies the upper size limit to ensure components thread properly. Series: 683 Go Ring Gauge for metric coarse 6g threads Thread size: M45 x 4. 5, right hand Go gauge class: 6g tolerance to maintain accurate MMC (maximum material condition)