Castle Nuts, also known as slotted hex nuts or slotted castle nuts, are six-sided nuts featuring slots on the top, giving them a distinct appearance reminiscent of a medieval castle’s turret. These slots are used to secure the nut in place with a cotter pin, making them ideal for applications where vibration might cause loosening.

Castle nuts are available in both metric and imperial dimensions, and they are manufactured to suit various thread types including UNC (Unified Coarse), UNF (Unified Fine), UN (Unified National), and ISO metric profiles. They are produced in a wide range of materials and ASTM grades, accommodating diverse industrial requirements.

You can explore further details such as manufacturing techniques, forming styles, available sizes, thread types, weight charts, torque specifications, and material categories on the full product page.