Split Lock Washer Finish Plain Material Stainless Steel For Screw Size 5/16 in Inside Diameter 0.314 in Outside Diameter 0.457 in Maximum Thickness 0.093 in Minimum Thickness 0.093 in Color Silver Dimensional Standards ASME B18.21.1 Inside Diameter Tolerance 0.314 in to 0.322 in Made in North America Yes Material Grade/Class 18-8 Maximum Temperature Not Applicable Minimum Temperature Not Applicable Outside Diameter Tolerance 0.457 in Pack Size Small Pack REACH Compliant Yes