Lock Washer, Lock Washer Type Internal Tooth Lock, Finish Plain, Material Stainless Steel, For Screw Size #4, Inside Diameter 0.116 in, Outside Diameter 0.265 in, Maximum Thickness 0.015 in, Color Silver, Dimensional Standards ASME B18.21.1, For Use With -, Material Grade/Class 316, Pack Size Small Pack, Rockwell Hardness B85, System of Measurement Inch, Thickness Tolerance 0.018 in to 0.012 in, Package Quantity 50