Pipe Threaded Plug Gauge, Dimension Type Inch, Gauge Type No-Go (Minus), Handle Design Member Only, Thread Class 2B, Thread Size 3/8 In.-18, Thread Type NPSM, Tolerance Class X, Gauge Finish Uncoated, Gauge Material Tool Steel, Handle Length None, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Pitch Diameter - No-Go Member 0.6329 in, Standards ASME B1.20.1, Thread Direction Right Hand