Pipe Thread Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Inch, Gauge Type Go (Plus), Pitch Diameter 1.8205 in, Pitch Diameter – Go Member 14.663 in, Thread Class 2A, Thread Size 1 1/4 In.-11 1/2, Thread Type NPSM, Finish Uncoated, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Standards ASME B1.20.1, Tolerance Class X
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