Value Collection CAI203100750-050B Carriage Bolt 5/16-18 3/4 in

Product Description

The VALUE COLLECTION CAI203100750-050B is a 5/16-18 carriage bolt with a 3/4-inch length under head, manufactured from Grade 2 steel with a zinc-plated finish. The square neck beneath the domed head locks into a pre-drilled hole to prevent rotation during installation, eliminating the need for a wrench on the bolt side. Conforming to ASTM A307 standards, this fastener is suited for general-purpose structural and fabrication applications where a smooth, flush bolt-head appearance is required. Sold in a minimum order quantity of 50 pieces per package.

This carriage bolt is used in light structural assembly, wood-to-wood connections, wood-to-metal connections, and general fabrication work. The zinc plating provides basic corrosion resistance for interior and sheltered exterior environments. Tradespeople in plumbing, HVAC, electrical, and general construction reach for carriage bolts when assembling equipment supports, pipe hangers, brackets, and framing components where a clean finished appearance on the bolt-head side is required.

Key Features

• 5/16-18 UNC thread for compatibility with standard inch-series nuts and hardware
• Square neck under the domed head locks into material to resist rotation during tightening
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc-plated finish provides basic corrosion protection for interior and sheltered applications
• 3/4-inch length under head suits thin-stock and light-duty structural connections
• Sold in 50-piece increments for job-site or shop stock replenishment

Compatibility

Designed for general-purpose use with standard 5/16-18 UNC nuts and washers in inch-system fastener applications.

Installation Notes

A licensed tradesperson or qualified mechanic should verify that Grade 2 fasteners meet the load requirements of the application before installation. Always drill the appropriate clearance hole so the square neck seats fully and prevents bolt rotation. Tighten the mating nut with a standard wrench or socket while holding the workpiece secure. Follow applicable building or mechanical codes when used in structural connections.