Asimeto Ring Thread Gauge (NoGo) - Metric - Right Hand - 6g - M18 x 1.5Designed for machinists, quality control professionals, and assembly technicians, the Asimeto Ring Thread Gauge (NoGo) provides a precise, quick check of metric external threads. Specifically sized for right hand M18 x 1. 5 fasteners, it verifies the thread pitch diameter against the 6g tolerance class to ensure proper fit and safe connections. Series: 686 Series ring gauges crafted for precision and long lasting performance. Size and standard: Metric