Ring Gage,UNEF,2A Class,1-7/16-18Thread
-18, Thread Type UNEF, Finish Chrome Plated, Gauge Design Adjustable, Hardness RC 60/62, Included Certification Certificate of Accuracy, Standards ASME B47.Threaded Ring Gage, Long Form Calibration Certificate Yes, Material Tool Steel, Dimension Type Inch, Gauge Type No-Go (Plus), Pitch Diameter 1.3949 in (No-Go), Pitch Diameter - No-Go Member 1.