Hillman 1/2 in. X 3 in. L Zinc-Plated Steel Carriage Bolt 50 pk

Carriage bolts are designed to fasten a wooden face to either a wood or metal frame. Its flat head is designed to eliminate the need for a washer and provide a semi-flush finish to applications. The square underside of the head is self-locking to eliminate spinning and the need for a driving tool. The zinc plating is rust resistant and provides a beautiful, consistent finish but may not work for all exterior projects. Zinc finish provides a beautiful, consistent finish Low-profile head - smooth, domed head Multi-material function No washer needed - square shoulder locks into material, eliminating the need for a flat washer Pre-drilling recommended - for installation, drill a hole in the material that matches the diameter of the bolt Zinc plating offers moderate protection