Threaded Plug Gauge Assembly Set Dimension Type Inch Gauge Type Go/No-Go (Plus/Minus) Handle Design Double End Included Handle Taperlock 5 Thread Class 2A Thread Size 1-1/2 In.-12 Thread Type UNF Tolerance Class X Gauge Length - Go Member 1 5/8 in Gauge Length - No-Go Member 1 5/8 in Gauge Material Tool Steel Handle Color Blue Handle Length 4 in Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - Go Member 1.444 in