Inner Ring Bore Diameter 3/4 in Outside Diameter 0.999 in Overall Width 1.01 in Ring Material Alloy Steel System of Measurement Inch Bore Diameter Tolerance +0.0000/-0.0004 in Finish Chrome Plated Lubrication Openings Oil Holes Outside Diameter Tolerance +0.0000/-0.0005 in Ring Material Grade 52100 Standards as 9100 ISO Certified 9001 Mil-B-3990 (SAE as 39901)