Carriage Bolts

Carriage bolts feature a smooth, domed round head with a square neck just beneath it. When tightened, the square neck bites into wood or seats into a square hole to prevent the bolt from turning, so installation is easy even when you can only access the nut side. Carriage bolts are a go-to fastener for wood-to-wood and metal-to-wood connections in construction, outdoor structures, and general equipment assembly.

American Bolt Corp stocks carriage bolts in multiple diameters and lengths, with options for corrosion resistance and strength to match your job—ASTM A307, Grade 5, Grade 8, and stainless steel.