Asimeto Ring Thread Gauge (NoGo) - Metric - Right Hand - 6g - M18 x 1The Asimeto Ring Thread Gauge (NoGo) in metric sizing is a precision instrument for verifying the pitch diameter of M18 x 1 right hand threads. Designed for machinists, quality control technicians, and assembly teams, it provides a clear go no go assessment to confirm fasteners stay within the 6g tolerance class. Series: 686 Series crafted for accuracy and longlasting performance. Thread Type: Metric, righthand threads (M18 x 1) for standard