J5811 Class ZZ Go Pin Gauge Material Steel Finish Black Oxide Diameter 0.9190 in Diameter Increment 0.0005 in Diameter Range 0.9170 in to 1.0005 in Diameter Sub-Range 0.9170 in to 0.9500 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