5/8"-18, THK=35/64", A/F=15/16" Slotted Hex Nuts, Finished Nut Pattern, Steel, Zinc Plated

Also known as castellated nuts.Designed to use a cotter pin that fits through the slots to prevent the nut from loosening.Diameter (Nominal): 5/8"Thread Pitch: 18Thickness (Nominal): 35/64"Across Flats (Basic): 15/16"Product Class: Internally Threaded...