Threaded Plug Gauge Dimension Type Inch Gauge Type Go (Plus) Handle Design Member Only Thread Class 2B 3B Thread Size #5-40 Thread Type UNC Tolerance Class X Gauge Finish Chrome Plated Gauge Length - Go Member 5/16 in Gauge Material Tool Steel Hardness RC 70-72 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - Go Member 0.1088 in Standards ASME B1.2 Thread Direction Right Hand