Threaded Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Metric, Gauge Type Go/No-Go (Plus/Minus), Pitch Diameter 12.994 mm (Go), 12.854 mm (No-Go), Pitch Diameter - Go Member 12.994 mm, Pitch Diameter - No-Go Member 12.854 mm, Thread Class 6G, Thread Length 14.3 mm, Thread Size M14 x 1.50, Thread Type Metric, Compatible Holder Size 4T, Finish Uncoated, Gauge Design Adjustable, Hardness RC 60-62