Supply of K- Thread Profile Gauge Plug Type- Go & No Go With Wear Limit- 1.0 Mm Size: 55.635 Mm X 6.35Mm For K-Thread- Trunnion- Right Side. Ref Drg No. Rdso-Sk 99002 Material- Tool Steel To Is: 3748/90. Hardness- 50/55 Hrc. Supply With Calibration Certificate- Valid For Year Issued From Nabl Approved Lab..