Asimeto Plug Thread Gauge (D/E) - Metric - Right Hand - 6H - M40 x 3The Asimeto 682 Series Plug Gauge is a precision tool crafted to verify the internal threads of metric fine fasteners with reliability and speed. Designed for machinists, quality control professionals, and maintenance teams, it provides dependable go no go checks on M40 x 3 threads in the 6H class. Series: 682 Series plug gauge for metric internal threads Thread size: M40 x 3 (internal thread diameter and pitch) Tolerance class: 6H, ensuring accurate