Split Lock Washer, Lock Washer Type Split Lock, Finish Zinc Plated, Material Spring Steel, For Screw Size #12, Inside Diameter 0.227 in, Outside Diameter 0.377 in, Maximum Thickness 0.056 in, Minimum Thickness 0.056 in, Dimensional Standards ASME B18.21.1, Material Grade/Class Grade 2, Pack Size Small Pack, Rockwell Hardness C38, System of Measurement Inch, Thickness Tolerance 0.056 in to 0.070 in, Package Quantity 100