Split Lock Washer Finish Black Oxide Material Steel For Screw Size 1 1/2 in Inside Diameter 1.504 in Outside Diameter 2.159 in Maximum Thickness 0.375 in Minimum Thickness 0.375 in Color Silver Dimensional Standards ASME B18.21.1 Inside Diameter Tolerance 1.504 in to 1.534 in Made in North America Yes Material Grade/Class Grade 2 Maximum Temperature Not Applicable Minimum Temperature Not Applicable Outside Diameter Tolerance 2.159 in Pack Size Small Pack REACH Compliant Yes