9/16"-18, THK=31/64", A/F=7/8" 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): 9/16"Thread Pitch: 18Thickness (Nominal): 31/64"Across Flats (Basic): 7/8"Product Class: Internally Threaded...