Threaded Ring Gauge Long Form Calibration Certificate No Material Tool Steel Dimension Type Inch Gauge Type No-Go (Minus) Pitch Diameter 0.5303 in Pitch Diameter - No-Go Member 0.5303 in Thread Class 2A Thread Length 9/16 in Thread Size 9/16 In.-24 Thread Type UNEF Compatible Holder Size 4T Finish Uncoated Gauge Design Adjustable Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Standards ASME B1.2 Tolerance Class X