Midwest Fastener 9/16-18 in. Castle Hex Nut

The Midwest Fastener 9/16-18 in. Castle Hex Nut is designed for dependable locking and fastening in automotive, agricultural, and industrial applications. Crafted from Grade A steel, this slotted castle nut is engineered to accommodate a cotter pin or safety wire through the slots and bolt hole to prevent unintentional loosening caused by vibration. Featuring a protective zinc plating, this fine-thread hex nut offers reliable corrosion resistance and lasting durability in demanding outdoor and shop environments.