Threaded Plug Gauge Assembly, Dimension Type Inch, Gauge Type Go/No-Go (Plus/Minus), Handle Design Double End, Included Handle Taperlock 000, Thread Class 2B, Thread Size #3-48, Thread Type UNC, Tolerance Class X, Gauge Finish Chrome Plated, Gauge Length – Go Member 1/4 in, Gauge Length – No-Go Member 3/16 in, Gauge Material Tool Steel, Handle Color Blue, Handle Length 1 1/2 in, Hardness RC 70-72, Included Certification Certificate of Accuracy with NIST Traceability