Description
Carriage bolts feature a smooth, dome shaped head, without an external drive for appearance, safety and security. Underneath the head is a square section that is the same diameter as the threaded portion of the bolt, allowing the bolt to be installed with just a single tool. Pre-drilled holes are required for installation. Hillman 5/16-in x 5-1/2-in Zinc-plated Coarse Thread Interior Carriage Bolt (1) | 240124