Spacer Spacer Type Round For Screw Size #8 Overall Length 5/8 in Inside Diameter 0.166 in Outside Diameter 0.3125 in Retaining Rib Diameter Not Applicable Material Stainless Steel Material Grade/Class 18-8 Finish Plain Pack Size Small Pack System of Measurement Inch Hex Width Not Applicable Color Silver Dimensional Standards ASTM A582 Hex Width Tolerance Not Applicable Inside Diameter Tolerance 0 to 0.01 in Outside Diameter Tolerance +/-0.005 in