Threaded Plug Gauge, Dimension Type Inch, Gauge Type No-Go (Minus), Handle Design Member Only, Thread Class 2B, Thread Size 1/4 In. -20, Thread Type UNC, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length - No-Go Member 5/16 in, Gauge Material Tool Steel, Hardness RC 70-72, Included Certification Certificate of Accuracy With NIST Traceability, Pitch Diameter - No-Go Member 0.2224 in, Standards ASME B 1.2, Thread Direction Right Hand. This item has been restricted from sale in the following state (s): []