Check the listing for details. VERMONT GAGE 361142010 Threaded Ring Gauge Dimension Type Inch 6DJC5. Condition: New. Listed at 171.00 USD. Threaded Ring Gauge, Long Form Calibration Certificate No, Material Tool Steel, Dimension Type Inch, Gauge Type Go (Plus), Pitch Diameter 0.4757 in, Pitch Diameter - Go Member 0.4757 in, Thread Class 2A, Thread Length 7/16 in, Thread Size 1/2 In.-28, Thread Type UNEF, Compatible Holder Size 3T, Finish Uncoated, Gauge Design Adjustable, Hardness RC 60-62, Included Certification Certificate of Accuracy with NIST Traceability, Standards ASME B1.2, Tolerance Class X Adjustable Thread Ring Gages � Class 2A and 6g Class X thread gage tolerance Tool steel constructionUse to inspect externally threaded product to assure assembly of mating parts and to verify min./max. pitch dia. limits. SAE gages meet ASME B1.2 standards. Metric gages meet ASME B1.16M standards.