Threaded Plug Gauge Assembly Set Dimension Type Inch Gauge Type Go/No-Go (Plus/Minus) Handle Design Double End Included Handle Taperlock 1 Thread Class 2A Thread Size 5/16 In.-18 Thread Type UNC Tolerance Class X Gauge Length - Go Member 3/4 in Gauge Length - No-Go Member 3/4 in Gauge Material Tool Steel Handle Color Blue Handle Length 2 3/4 in Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - Go Member 0.2752 in