Castle Nut Finish Black Oxide Material Steel Material Grade/Class Grade 5 Thread Size 7/8 In.-9 Hex Width 1 5/16 in Hex Height 31/64 in Hex Type Standard Hex Lock Type Slotted Castle Dimensional Standards ASME B18.2.2 Material Quality Standards ASME B18.2.2 SAE J995 System of Measurement Inch Thread Direction Right Hand For Pin Diameter 5/32 in Maximum Slot Width 0.24 in Minimum Slot Width 0.18 in Overall Height 31/64 in Pack Size Small Pack Package Quantity 10