Pipe Threaded Plug Gauge, Dimension Type Inch, Gauge Type Go (Plus), Handle Design Member Only, Thread Size 1 In.-11-1/2, Thread Type NPSF, 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 1.2284 in, Thread Direction Right Hand