5/8"-18 Hex Flange Locknuts/Serrated/Case Hardended Steel/Zinc Plated (Quantity: 50)

Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Zinc And Bake manufactured to ASME B18.16.4-2008 Specifications | Flange provides a more uniform bearing-stress to clamp-force ratio than other low carbon lock nuts. Does not gall screw threads. | Requires a greater amount of torque to loosen than to tighten the nut. Will span oversized or poorly aligned holes. | Thread Diameter-Pitch: 5/8"-18 inches | Number of Nuts per Carton: 50