Square Cone

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A square cone washer, also known as a square cone seat washer, is a type of washer that features a square or rectangular shape with a raised, cone-like center. These washers are specifically designed for use with square neck bolts or carriage bolts. The square hole in the washer fits snugly over the square neck of the bolt, preventing the bolt from turning when the nut is tightened.

Square cone washers are primarily used in applications where it's important to prevent the rotation of the bolt or to provide a secure connection. The cone-shaped center helps center the bolt and provides a locking effect to keep the assembly in place.

These washers are commonly used in woodworking, construction, and other applications where square neck bolts are employed. Square cone washers come in various sizes and materials to match the corresponding bolts and the specific requirements of the application.