Everbilt 3/8 in. Rust Defender Gray Torque Washer (25-Pack)

Everbilt's Rust Defender Torque Washers have square holes that are designed for use with a carriage bolt. The washers have 4 bent prongs to allow it to be embedded into wood, plywood and other ductile materials. The finished square hole in the washer mates with the square shoulder of the carriage bolt preventing the rotation of the washer, making the washer self-retaining. The washer provides a smooth bearing surface, preventing the washer from embedding into soft materials, splitting and the loss of holding power.