Threaded Plug Gauge Dimension Type Inch Gauge Type Go (Plus) Handle Design Member Only Thread Class 2B 3B Thread Size 1 1/2 In.-12 Thread Type UNF Tolerance Class X Gauge Finish Chrome Plated Gauge Length - Go Member 1 in Gauge Material Tool Steel Hardness RC 70-72 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - Go Member 1.4459 in Standards ASME B1.2 Thread Direction Right Hand