Hex Locknut Assortment Includes Washers Yes Lock Type External Tooth Lock Washer Number of Nuts 600 Number of Thread Sizes 6 Nut Finish Zinc Plated Nut Material Steel Nut Type Hex Lock Nut System of Measurement Inch/Metric Thread Sizes #10-24 #10-32 #4-40 #6-32 #8-32 1/4 In.-20