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The VALUE COLLECTION 3GBC904C0208 is a 1/4-20 UNC carriage bolt with a 2-1/2 inch length under head, manufactured from Grade 1006-1050 steel with a galvanized zinc-plated finish. The round domed head and square neck are designed to pull into a mating material and resist rotation during assembly, eliminating the need for a wrench on the bolt end. Fully threaded along its shank, this fastener suits applications requiring maximum thread engagement. It meets ASME B18.5 dimensional standards, making it a reliable choice for structural and general-purpose fastening tasks across trades and light industrial work.
This carriage bolt is suited for wood-to-wood, wood-to-metal, and light structural connections in residential and commercial construction, HVAC equipment mounting, plumbing support framing, and electrical enclosure assembly. The galvanized zinc-plated finish provides corrosion resistance appropriate for indoor and moderately exposed installations. Supplied as a single piece with a minimum order quantity of 100 units, this bolt is intended for bulk procurement by contractors and tradespeople who need consistent, standards-compliant fasteners on the job.
Designed as a standard ASME B18.5 inch-series carriage bolt for use in wood, metal, and composite substrates requiring a 1/4-20 UNC threaded fastener with a 2-1/2 inch grip length under head.
Carriage bolts are typically installed by carpenters, general contractors, and trade professionals working on structural or equipment-support connections. Power down or de-energize any adjacent equipment before fastening near electrical or mechanical systems. Drive the bolt through a pre-drilled clearance hole so the square neck seats fully into the material before applying a nut and washer on the opposite side. Tighten the nut with a standard wrench or socket; do not strike the head directly with a hammer once the neck is seated, as this can deform the shank.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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