Value Collection 489032PS Carriage Bolt 1/4-20 4 in

Product Description

The VALUE COLLECTION 489032PS is a 1/4-20 carriage bolt with a 4-inch length under head and a square neck designed to resist rotation during installation. Made from Grade 2 steel with a zinc-plated finish, this fastener meets ASTM A307 standards for general-purpose structural and mechanical applications. The square neck seats flush into wood or soft materials, pulling tight against the surface as the nut is driven. Electricians, plumbers, HVAC technicians, and general contractors reach for this bolt when assembling equipment supports, strut systems, hangers, and mounting frames.

This carriage bolt is suited for light-to-medium-duty fastening tasks in both residential and commercial settings. Common applications include securing equipment pads, mounting panels to wood framing, assembling unistrut or channel-framing systems, and attaching brackets to structural lumber. The zinc plating provides basic corrosion resistance appropriate for indoor and dry-to-mildly-humid environments. This SKU is sold individually but requires a minimum order quantity of 100 units per order.

Key Features

• 1/4-20 UNC thread for broad compatibility with standard nuts and hardware
• 4-inch length under head suits deeper assemblies and stacked materials
• Square neck locks into substrate to prevent spinning during nut tightening
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc-plated finish offers basic corrosion resistance for indoor use

Compatibility

Designed as a standard 1/4-20 UNC inch-series carriage bolt compatible with any 1/4-20 hex nut, flange nut, or coupling nut and suitable for use in wood, composite, or soft-metal assemblies requiring a flush-bearing, non-spinning fastener.

Installation Notes

Installation is typically performed by any trade requiring structural fastening — HVAC, plumbing, electrical, or general construction. Drill a clean through-hole sized to the bolt shank before inserting so the square neck seats fully flush. Apply hand pressure or a mallet tap to seat the neck, then thread the nut and tighten with a wrench — do not over-torque Grade 2 hardware. Follow applicable building or mechanical codes for fastener selection in structural or load-bearing assemblies.