Value Collection 3GBC904C0400 Carriage Bolt 1/4-20 4 in

Product Description

The VALUE COLLECTION 3GBC904C0400 is a 1/4-20 UNC carriage bolt with a 4-inch length under the head, designed for general fastening applications across construction, fabrication, and trade installations. The square neck under the dome head locks into wood or soft material to prevent rotation during tightening. Manufactured from Grade 1006-1050 steel with a galvanized zinc-plated finish, this bolt resists corrosion in exposed or moisture-prone environments. It is fully threaded along its entire 4-inch shank, conforming to ASME B18.5 standards. Tradespeople working in wood framing, equipment mounting, and structural assembly will find this a reliable standard-size fastener.

This carriage bolt is suited for residential and light commercial applications where a flush, smooth dome head is required on the show face of an assembly. Common uses include deck and fence construction, equipment mounting to wood substrates, and general structural connections. The fully threaded shank provides maximum thread engagement when used with a standard 1/4-20 hex nut and washer. Sold individually per package, with a minimum order quantity of 100 units, making it practical for stocking or bulk project use.

Key Features

• 1/4-20 UNC thread size with full threading along the 4-inch shank
• Square neck under the dome head prevents bolt rotation during installation
• Grade 1006-1050 steel construction for reliable tensile performance in general-duty applications
• Galvanized zinc-plated finish provides corrosion resistance in outdoor or damp environments
• Conforms to ASME B18.5 fastener standard
• Inch measurement system; length specified as length under head

Compatibility

Designed as a standard 1/4-20 UNC carriage bolt for use with compatible 1/4-20 hex nuts, wing nuts, and washers in wood and light structural assemblies per ASME B18.5 specifications.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole sized to allow the square neck to seat flush and grip the material surface, preventing spin. A standard open-end or socket wrench is used to tighten the mating nut from the opposite side. Always verify hole diameter is matched to the bolt shank to ensure the square neck seats correctly. Consult applicable building codes and structural specifications when using in load-bearing connections.