Value Collection 32159 Carriage Bolt 1/4-20 3 Inch Grade 5

Product Description

The VALUE COLLECTION 32159 is a 1/4-20 UNC carriage bolt designed for general fastening applications where a smooth, round head and anti-rotation square neck are required. The square neck seats into mating material to prevent the bolt from spinning during nut installation, eliminating the need for a wrench on the bolt head. At 3 inches in length under the head, it provides adequate thread engagement for typical structural and assembly connections. Manufactured from Grade 5 steel with a zinc-plated finish, it offers a solid combination of tensile strength and basic corrosion resistance suitable for indoor and light-duty outdoor use. Licensed trades and experienced DIYers rely on this bolt size across a wide range of construction and equipment assembly tasks.

This carriage bolt is suited for wood-to-wood, wood-to-metal, and light structural connections in residential and commercial construction, HVAC equipment mounting, electrical enclosure assembly, and general fabrication. The 1/4-20 UNC thread is one of the most common inch-series thread specifications, making compatible nuts and hardware widely available. The zinc finish is appropriate for dry or low-moisture environments. Minimum order quantity is 100 pieces, making this bolt well-suited for contractors and shops that require bulk fastener stock.

Key Features

• 1/4-20 UNC thread for broad hardware compatibility
• 3-inch length under head for adequate thread engagement in thicker assemblies
• Square neck prevents rotation during installation without a second tool on the bolt
• Grade 5 steel construction provides reliable tensile strength for structural fastening
• Zinc-plated finish delivers basic corrosion resistance in dry and low-moisture environments

Compatibility

Designed as a standard UNC inch-series carriage bolt compatible with 1/4-20 hex nuts, wing nuts, and washers conforming to ANSI inch fastener standards.

Installation Notes

Carriage bolts are typically installed by tradespeople and maintenance technicians using standard hand tools. Insert the bolt through the pre-drilled hole so the square neck seats fully and flush into the mating material before applying the nut. Do not overtighten beyond the rated proof load of Grade 5 fasteners. Fastener installations in structural or load-bearing applications should comply with applicable building codes and engineering specifications.