Hex Locknut Assortment, Includes Washers No, Lock Type Nylon Insert, Number of Nuts 272, Number of Thread Sizes 14, Number of Washers 0, Nut Finish Zinc Plated, Nut Material Steel, Nut Type Hex Lock Nut, System of Measurement Inch/Metric, Thread Sizes #10-24, #10-32, 1/2 In.-13, 1/2 In.-20, 1/4 In.-20, 1/4 In.-28, 3/4 In.-10, 3/4 In.-16, 3/8 In.-16, 3/8 In.-24, 5/16 In.-18, 5/16 In.-24, 5/8 In.-11, 5/8 In.-18, 7/16 In.-14, 7/16 In.-20