Castle Nut Finish Black Oxide Material Steel Material Grade/Class Grade 5 Thread Size 1 In.-8 Hex Width 1 1/2 in Hex Height 55/64 in Hex Type Standard Hex Lock Type Slotted Castle Dimensional Standards ASME B18.2.2 System of Measurement Inch Thread Direction Right Hand For Pin Diameter 7/32 in Maximum Slot Width 0.3 in Pack Size Small Pack Package Quantity 5