Castle Nut Finish Black Oxide Material Steel Material Grade/Class Grade 2H Thread Size 1 In.-8 Hex Width 1 5/8 in Hex Height 63/64 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 7/32 in Maximum Slot Width 0.3 in Minimum Slot Width 0.24 in Overall Height 63/64 in Pack Size Small Pack Package Quantity 5