Threaded Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Pitch Diameter 0.1428 (Go), 0.1399 (No-Go), Pitch Diameter - Go Member 0.1428 in, Pitch Diameter - No-Go Member 0.1399 in, Thread Class 2A, Thread Length 3/16 in, Thread Size #8-32, Thread Type UNC, Compatible Holder Size 1T, Finish Uncoated, Gauge Design Adjustable, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability