Lock Nut, Finish Zinc Plated, Hex Height 7/32 in, Hex Type Standard Hex Center Lock, Hex Width 7/16 in, Lock Type Center-Lock Distorted Thread, Material Steel, Material Grade/Class Grade A, Pack Size Small Pack, Rockwell Hardness C28 Max., System of Measurement Inch, Thread Direction Right Hand, Thread Size 1/4 In.-20, Package Quantity 100