Threaded Plug Gauge Assembly Dimension Type Inch Gauge Type Go/No-Go (Plus/Minus) Handle Design Double End Included Handle Taperlock 5 Thread Class 2B Thread Size 1 1/2 In.-6 Thread Type UNC Tolerance Class X Gauge Finish Chrome Plated Gauge Length - Go Member 1 1/4 in Gauge Length - No-Go Member 3/4 in Gauge Material Tool Steel Handle Color Blue Handle Length 4 in Hardness RC 70-72 Included Certification Certificate of Accuracy with NIST Traceability