Castle Nut Finish Zinc Plated Material Steel Material Grade/Class Grade 5 Thread Size 1/2 In.-20 Hex Width 3/4 in Hex Height 29/64 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 Color Clear For Pin Diameter 9/64 in Maximum Slot Width 0.18 in Minimum Slot Width 0.15 in Overall Height 29/64 in Pack Size Small Pack Package Quantity 50