Threaded Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Pitch Diameter 0.0978 (Go), 0.0954 (No-Go), Pitch Diameter - Go Member 0.0978 in, Pitch Diameter - No-Go Member 0.0954 in, Thread Class 2A, Thread Length 5/32 in, Thread Size #4-48, Thread Type UNF, Compatible Holder Size 1T, Finish Uncoated, Gauge Design Adjustable, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability