Value Collection 34678 Carriage Bolt 1/2-13 Unc 1.5in Zinc

Product Description

The VALUE COLLECTION 34678 is a standard square neck carriage bolt designed for general fastening applications in wood, metal, and structural assemblies. It features a 1/2-13 UNC thread pattern with a 1-1/2 inch length under head, providing reliable clamping force in a compact form factor. Manufactured from Grade 2 steel with a zinc-plated finish, this bolt offers basic corrosion resistance suitable for indoor and light outdoor use. The domed head and square neck prevent rotation during installation, eliminating the need for a wrench on the bolt side. Installers across construction, fabrication, and maintenance trades rely on this style for quick, secure fastening.

This carriage bolt is suited for residential and light commercial construction, woodworking, equipment mounting, and general structural connections. The 1/2-13 UNC thread is a widely used coarse-thread standard, compatible with standard hex nuts, flat washers, and lock washers of the same thread class. It is a common choice when a flush, tamper-resistant head is required on the accessible face of a joint. Meets ASTM A307 standards for low-carbon steel fasteners used in general structural applications.

Key Features

• 1/2-13 UNC coarse thread for broad nut and hardware compatibility
• 1-1/2 inch length under head for compact structural connections
• Standard square neck locks into material to prevent bolt rotation during tightening
• Grade 2 steel construction meets ASTM A307 structural fastener standards
• Zinc-plated finish provides basic corrosion resistance for dry and light-moisture environments

Compatibility

Designed as an OEM-style replacement and general-use carriage bolt compatible with standard 1/2-13 UNC hex nuts, washers, and coupling hardware in residential and light commercial structural applications.

Installation Notes

Installation is typically performed by carpenters, ironworkers, or general contractors using standard hand or power tools. Drill a clean hole sized to allow the square neck to seat flush and lock before applying a nut and washer to the threaded end. Tighten from the nut side only — the square neck is designed to resist turning. Follow applicable building codes and structural load requirements when using fasteners in load-bearing assemblies.