Castle Nut Finish Black Oxide Material Steel Material Grade/Class Grade 2H Thread Size 1 3/4 In.-5 Hex Width 2 3/4 in Hex Height 1 23/32 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 3/8 in Maximum Slot Width 0.52 in Minimum Slot Width 0.43 in Overall Height 1 23/32 in Pack Size Small Pack Package Quantity 5