Threaded Plug Gauge Dimension Type Metric Gauge Type No-Go (Minus) Handle Design Member Only Thread Class 6H Thread Size M2.5 x 0.45 Thread Type Metric Tolerance Class X Gauge Finish Chrome Plated Gauge Length - No-Go Member 4.80 mm Gauge Material Tool Steel Hardness RC 70-72 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - No-Go Member 2.3 mm Standards ASME B1.16M Thread Direction Right Hand