Value Collection 3GBC904C0308 Carriage Bolt 1/4-20 3.5 in

Product Description

The VALUE COLLECTION 3GBC904C0308 is a 1/4-20 carriage bolt designed for general fastening applications across construction, mechanical assembly, and structural work. Built from Grade 1006-1050 steel with a galvanized zinc-plated finish, it provides reliable corrosion resistance in both indoor and outdoor environments. The bolt measures 3.5 inches in length under head and features a fully threaded shank with a square neck that locks into material to prevent rotation during installation. It conforms to ASME B18.5 standards, making it a dependable choice for code-conscious work.

This carriage bolt suits a wide range of fastening scenarios including wood-to-wood connections, framing, decking, and equipment mounting. The UNC thread form and inch measurement system make it compatible with standard SAE nuts and hardware. It is appropriate for light-to-medium structural assemblies where a clean, round-head profile is required. This fastener is typically installed by carpenters, general contractors, millwrights, and maintenance technicians.

Key Features

• 1/4-20 UNC thread for compatibility with standard inch-system nuts and hardware
• Fully threaded shank along the full 3.5-inch length under head
• Square neck locks into material to prevent spinning during nut tightening
• Galvanized zinc-plated finish for corrosion resistance in exposed environments
• Conforms to ASME B18.5 fastener standard
• Grade 1006-1050 steel construction for consistent mechanical properties

Compatibility

Designed as a standard ASME B18.5 inch-series carriage bolt compatible with 1/4-20 UNC hex nuts, coupling nuts, and washers in standard SAE sizing.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole sized to allow the square neck to seat flush, preventing rotation. A standard wrench or socket is used to tighten the mating nut from the opposite side. Always ensure the hole diameter matches the bolt shank to allow the square neck to properly seat. Installer should verify load and torque requirements against applicable structural or mechanical codes for the specific application.