Pipe Threaded Setting Plug Gauge, Dimension Type Inch, Gauge Type Go (Plus), Handle Design Member Only, Thread Class 2A, 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 - Go Member 0.6256 in, Standards ASME B1.20.1, Thread Direction Right Hand