Lock Nut Finish Zinc Plated Material Steel Material Grade/Class Grade A Thread Size 1/2 In.-20 Hex Width 3/4 in Hex Height 29/64 in Lock Type Serrated Dimensional Standards ASME B18.16.4 System of Measurement Inch Hex Type Flange Hex Thread Direction Right Hand Flange Diameter 1.031 in Pack Size Small Pack Package Quantity 50