ZORO SELECT CLNFI20500-050P Center-Lock Distorted Thread Reversible Lock Nut,
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 7/16 in, Lock Type Center Lock Distorted Thread, Dimensional Standards IFI-100/107, System of Measurement Inch, Hex Type...