Metal Bolts and Studs

Carriage Bolts

Carriage bolts are specialized fasteners featuring a low-profile, domed head and an integrated square or ribbed neck that provides a self-locking mechanism. When seated into a pre-drilled cavity, the under-head geometry prevents rotation, allowing for single-sided nut installation while resisting rotational shear. The smooth dome head eliminates external grip points, offering excellent tamper resistance and minimizing snag hazards. These bolts are primarily utilized in heavy timber construction, structural wood-to-metal assemblies, and security-critical public infrastructure where a flush, irreversible exterior is necessary.