Carriage Bolt

A carriage bolt, also known as a coach bolt or round head square neck bolt, is a threaded fastener with a smooth, cylindrical shaft and a rounded head with a square shoulder or neck just below the head. The square neck is designed to fit into a square hole in the material being fastened, preventing the bolt from turning when tightened. Carriage bolts are often used in wood-to-wood and wood-to-metal applications, such as in furniture assembly, construction, and outdoor structures.

Sizing Ranges

Diam. #10 thru 1″


Round Head Carriage Bolt, Flat Head Carriage Bolt, Square Neck Carriage Bolt, Ribbed Neck Carriage Bolt, Short Neck Carriage Bolt, Plow Bolt, T-Bolt, Elevator Bolt.


Zinc, Black Oxide, Ceramic, Teflon

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