Threaded Ring Gauge Long Form Calibration Certificate No Material Tool Steel Dimension Type Metric Gauge Type Go/No-Go (Plus/Minus) Pitch Diameter 12.663 mm (Go) 12.503 mm (No-Go) Pitch Diameter - Go Member 12.663 mm Pitch Diameter - No-Go Member 12.503 mm Thread Class 6G Thread Length 14.3 mm Thread Size M14 x 2.00 Thread Type Metric Compatible Holder Size 4T Finish Uncoated Gauge Design Adjustable Hardness RC 60-62