Castle Nuts
Castle Nuts
Key Features of Castle Nuts:- Slotted Design: The notches on one end of the nut accommodate a cotter pin, ensuring the nut remains securely in place.
- High Security: Ideal for applications where vibration or movement could cause standard nuts to loosen, providing a reliable locking mechanism.
- Imperial Sizes: Range from 1-8 to 1 1/4-7, offering a variety of options to fit different bolt diameters and application requirements.
- Automotive: Commonly used in vehicle assemblies, particularly in securing wheel bearings and other critical components where safety is paramount.
- Machinery: Essential for machinery and equipment subject to vibration and rotational forces, ensuring components remain securely fastened.
- Aerospace and Marine: Used in applications where secure fastening is critical due to exposure to dynamic forces and harsh environments.
- Enhanced Security: The use of a cotter pin with the slotted design provides a fail-safe against loosening, ensuring the nut remains in place under adverse conditions.
- Durability: Made from high-quality materials to withstand demanding environments and provide long-lasting performance.
- Versatility: Suitable for a wide range of applications, from automotive and machinery to aerospace and marine industries.
Why Choose Springs Fastener?
Shipping Details

Most orders ship within 24 hours. Shipping is available across the United States.
Comprehensive Inventory

Our extensive catalog includes fasteners in various materials, finishes, sizes, and grades.
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We accept Visa, MasterCard, AMEX, and Discover.
Purchasing Options

Our fasteners are available in both individual packages and in bulk quantities with tiered bulk pricing.