Lock Nut Finish Zinc Plated Material Steel Material Grade/Class Grade A Thread Size 1/4 In.-20 Hex Width 7/16 in Hex Height 15/64 in Lock Type Serrated Dimensional Standards ASME B18.16.4 System of Measurement Inch Hex Type Flange Hex Thread Direction Right Hand Flange Diameter 0.505 in Pack Size Small Pack Package Quantity 100