Value Collection 489051PS Carriage Bolt 5/16-18 2-3/4 in Grade 2

Product Description

The VALUE COLLECTION 489051PS is a 5/16-18 carriage bolt with a 2-3/4 inch length under head, designed for general-purpose fastening in wood, metal, and structural assemblies. The square neck seats into the work material to prevent rotation during installation, eliminating the need for a wrench on the bolt head. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener meets ASTM A307 standards and is suited for low-carbon steel applications where moderate tensile strength is required. It is installed by tradespeople and contractors across construction, mechanical, and light fabrication work.

This carriage bolt is used in residential and light commercial construction for attaching lumber, connecting metal brackets, and securing framing components. The zinc-plated finish provides basic corrosion resistance for indoor and sheltered outdoor applications. The UNC (Unified National Coarse) thread form is compatible with standard 5/16-18 nuts and threaded hardware. This fastener ships in a minimum order quantity of 100 pieces, making it appropriate for job-site stocking and bulk fastener needs.

Key Features

• 5/16-18 UNC thread for compatibility with standard coarse-thread nuts and hardware
• 2-3/4 inch length under head suits a range of lumber and material thicknesses
• Square neck design locks into material to resist rotation during tightening
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc-plated finish provides corrosion resistance in dry and sheltered environments

Compatibility

Designed as a standard inch-series carriage bolt compatible with 5/16-18 UNC hex nuts, washers, and threaded inserts conforming to ASTM A307 specifications.

Installation Notes

Installation is performed by carpenters, ironworkers, or general contractors using a standard socket or wrench on the nut side only. The square neck must be fully seated into the mating material before torquing the nut to prevent bolt spin. Follow applicable building codes and project specifications for fastener grade and torque requirements. Do not use in applications requiring high-strength fasteners where Grade 5 or Grade 8 hardware is specified.