Threaded Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Pitch Diameter 0.6832 (Go), 0.6773 (No-Go), Pitch Diameter - Go Member 0.6832 in, Pitch Diameter - No-Go Member 0.6773 in, Thread Class 2A, Thread Length 3/4 in; 9/16 in, Thread Size 3/4 In.-10, Thread Type UNC, Compatible Holder Size 4T, Finish Uncoated, Gauge Design Adjustable, Hardness RC 60-62