Lock Nut Finish Zinc Plated Material Steel Material Grade/Class Grade 2 Thread Size 1/2 in-13 Hex Width 3/4 in Hex Height 29/64 in Lock Type Serrated System of Measurement Inch Hex Type Flange Hex Thread Direction Right Hand Flange Diameter 1.031 in Flange Thickness 0.05 in Pack Size Bulk Pack Rockwell Hardness C40 Max Surface Package Quantity 800