Midwest Fastener 5/16 in.-24 Fine Castle Hex Nut

The Midwest Fastener fine castle hex nut provides dependable locking and fastening for automotive, agricultural, and general mechanical applications. Designed with slotted notches on one end, this castle nut allows for the insertion of a cotter pin or safety wire through the mating bolt to prevent accidental loosening caused by vibration. Constructed from durable Grade A steel, this fastener features a protective zinc finish that offers enhanced corrosion resistance and lasting service life. It is engineered for precision threading and secure assembly in demanding environments.