J5804 Class ZZ Go Pin Gauge Material Steel Finish Black Oxide Diameter 0.0270 in Diameter Increment 0.0005 in Diameter Range 0.0110 in to 0.0605 in Diameter Sub-Range 0.0255 in to 0.0500 in Dimension Type Inch Gauge Type Go (Plus) Included Certification Certificate of Accuracy with NIST Traceability Surface Finish 10 Microinch or Better Tolerance 0.00020 in Tolerance Class ZZ Hardness RC 60/65 Long Form Calibration Certificate No Overall Length 2 in Standards ISO 17025