Midwest Fastener 5/16″-24 Zinc Plated Fine Thread Castle Hex Nuts – 80442 – Bolts

Product Features:

• A castle nut is a hex nut with slots (notches) cut into one end. The slots allow for a cotter pin to be installed between them and through the bolt/stud the nut is being threaded onto. The cotter pin prevents the nut from working loose. Often found in automotive applications like ball joints and tie rod ends.
• Item Type: Castle Nut
• Thickness: 21/64″
• Drive Type: 1/2″ Wrench
• Thread Size: 24
• Thread Type: Fine
• Material: Steel
• Finish: Zinc