Pipe Threaded Plug Gauge Dimension Type Inch Gauge Type Go/No-Go (Plus/Minus) Handle Design Double End Included Handle Taperlock 7 Thread Class 2B Thread Size 2 1/2 In.-8 Thread Type NPSM Tolerance Class X Gauge Finish Uncoated Gauge Material Tool Steel Handle Color Blue Handle Length 4 in Handle Material Aluminum Hardness RC 60-62 Included Certification Certificate of Accuracy with NIST Traceability Pitch Diameter - Go Member 2.7622 in Pitch Diameter - No-Go Member 2.772 in