J5810 Class ZZ Go Pin Gauge Material Steel Finish Black Oxide Diameter 0.8580 in Diameter Increment 0.0005 in Diameter Range 0.8330 in to 0.9165 in Diameter Sub-Range 0.8505 in to 0.8750 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