Value Collection CAI503101250-100BX Carriage Bolt 5/16-18

Product Description

The VALUE COLLECTION CAI503101250-100BX is a 5/16-18 carriage bolt designed for through-bolting wood, metal, and structural assemblies. It features a smooth, domed head with a square neck that bites into the material surface during installation, preventing rotation without the need for a wrench on the bolt side. The shank is Grade 5 steel with a zinc-plated finish for corrosion resistance in general service environments. This box contains 100 bolts, each measuring 1-1/4 inches in length under the head. These fasteners are used by carpenters, ironworkers, millwrights, and general contractors for framing, equipment mounting, and structural connections.

These carriage bolts are suited for residential and light commercial construction applications including deck framing, fence assembly, and metal-to-wood connections. The 5/16-18 UNC thread pattern is a common standard in North American structural fastener applications. The zinc plating provides adequate corrosion protection for indoor and covered outdoor use. The 100-count box format is practical for job-site use where multiple fasteners are required for a single project or task.

Key Features

• 5/16-18 UNC thread for compatibility with standard hex nuts and coupling nuts
• Square neck under the domed head locks against the mounting surface to prevent bolt spin during nut tightening
• Grade 5 steel construction for medium-strength structural fastening
• Zinc-plated finish for corrosion resistance in general service and covered outdoor environments
• 1-1/4 inch length under head suits standard framing and panel thicknesses
• 100-bolt box quantity supports project-scale and repeat-task use

Compatibility

Designed as a standard UNC carriage bolt for use with 5/16-18 hex nuts, lock nuts, and flat washers in wood-to-wood or metal-to-wood fastening assemblies.

Installation Notes

Installation is typically performed by carpenters, ironworkers, or general contractors using a standard wrench or socket on the nut side. Drill the clearance hole to match the bolt diameter, insert the bolt from the face side, and seat the square neck into the material before applying the nut. Do not use an impact driver directly on the bolt head, as this can damage the square neck seat. Torque to fastener and structural specification requirements per applicable building code.