HILLMAN 1/4 in. Dia. x 1 in. L Zinc-Plated Steel Carriage Bolt 100 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 and provides a beautiful, consistent finish, but, may not work for all exterior projects. Diameter: 1/4 In. Length: 1-1/4 In. Finish: Zinc Grade: 2 Material: Steel Thread Type: Coarse Head Type: Round Nut(s) Included: No Thread Count: Drive Style: Features Made in China USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.