Value Collection CAI505003250-025BX Carriage Bolt 1/2-13 3-1/4 in

Product Description

The VALUE COLLECTION CAI505003250-025BX is a 1/2-13 UNC carriage bolt with a 3-1/4 inch length under head and a square neck bearing surface. Manufactured from Grade 5 steel with a zinc-plated finish, this fastener is suited for structural and general-purpose bolted connections where a smooth, round head and anti-rotation neck are required. The zinc coating provides a baseline level of corrosion resistance for indoor and light-duty outdoor applications. Each package contains 25 bolts, sold as a unit. Tradespeople, contractors, and maintenance technicians working in fabrication, construction framing, or equipment assembly will find this a standard stocking fastener.

Carriage bolts of this thread size and length are commonly used in wood-to-wood, wood-to-metal, and light structural assemblies. The 1/2-13 UNC thread is a standard coarse-thread designation compatible with 1/2-inch nuts and threaded hardware across residential and light commercial construction, HVAC equipment bases, electrical enclosure mounts, pool equipment framing, and general maintenance applications. The square neck seats into a drilled hole to prevent rotation during installation, eliminating the need for a second wrench on the bolt head.

Key Features

• 1/2-13 UNC coarse-thread specification for broad hardware compatibility
• 3-1/4 inch length under head suits medium-depth through-bolt connections
• Square neck prevents rotation during nut tightening without tools on the bolt head
• Grade 5 steel construction meets standard structural strength requirements
• Zinc-plated finish provides corrosion resistance for indoor and sheltered installations
• 25-bolt package quantity supports job-site and shop stocking needs

Compatibility

Designed as a standard inch-system UNC carriage bolt compatible with 1/2-13 nuts, washers, and threaded inserts used in general construction, structural, and mechanical fastening applications.

Installation Notes

Installation requires a drilled or punched hole sized to allow the square neck to seat flush and resist rotation. A standard socket or open-end wrench applied to the mating nut is sufficient for tightening. Follow applicable building codes and fastener torque guidelines for the material and load condition. Inspect the zinc coating for damage before installation in corrosive or high-moisture environments, and consider a stainless or hot-dip galvanized alternative for fully exposed outdoor use.