Asimeto Plug Thread Gauge (D/E) - Metric - Right Hand - 6H - M18 x 1.5The Asimeto Plug Thread Gauge (D E) in the 682 Series is a precision tool designed for quick, reliable verification of internal metric threads. Built for machinists, inspectors, and maintenance professionals, it confirms the pitch diameter of M18 x 1. 5 right hand threads to 6H tolerance with consistent accuracy. Thread size and tolerance: Metric plug gauge for M18 x 1. 5, right hand threads, conforming to 6H tolerance. Gauge type: Internal thread