Castle Nut Finish Black Oxide Material Steel Material Grade/Class Grade 2H Thread Size 7/8 In.-9 Hex Width 1 7/16 in Hex Height 55/64 in Hex Type Standard Hex Lock Type Slotted Castle Dimensional Standards ASME B1.1 ASME B18.2.2 Material Quality Standards ASTM A194 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 55/64 in Pack Size Small Pack Package Quantity 10