Value Collection 34579 Carriage Bolt 1/4-20 2 in Square Neck

Product Description

The VALUE COLLECTION 34579 is a 1/4-20 UNC carriage bolt with a 2-inch length under head and a square neck, manufactured from Grade 2 steel with a zinc-plated finish. The square neck seats into the material being fastened to prevent rotation during installation, eliminating the need for a wrench on the bolt head. This fastener conforms to ASTM A307 standards, making it suitable for general-purpose structural and assembly applications. Electricians, plumbers, HVAC technicians, and general contractors use carriage bolts like this one to secure brackets, strut channel, equipment supports, and framing components.

This carriage bolt is suited for light- to medium-duty fastening tasks in both residential and commercial construction and mechanical installations. Common applications include securing conduit hangers, pipe straps, equipment mounting brackets, wood-to-metal connections, and general fabrication work. The zinc plating provides a basic level of corrosion resistance appropriate for dry and mildly humid indoor environments. Sold individually per package with a minimum order quantity of 100 pieces, making it practical for stocking or job-lot purchasing.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-series nuts and hardware
• 2-inch length under head for moderate-depth fastening applications
• Square neck design prevents bolt rotation during tightening without a back wrench
• Grade 2 steel construction meets ASTM A307 standards for general-purpose use
• Zinc-plated finish provides basic corrosion resistance in dry indoor environments

Compatibility

Designed as a general-purpose inch-series carriage bolt compatible with standard 1/4-20 UNC nuts, washers, and threaded hardware used in structural and mechanical fastening applications.

Installation Notes

Carriage bolts are typically installed by tradespeople, contractors, or maintenance technicians using standard hand tools. Insert the bolt through a pre-drilled hole sized to allow the square neck to seat flush and prevent spinning, then secure with a compatible 1/4-20 nut and washer on the opposite side. Follow applicable code requirements such as NEC or IPC when using fasteners in electrical or plumbing system supports. Do not exceed the load ratings defined by ASTM A307 for Grade 2 fasteners in structural applications.