Value Collection CAI503703250-050BX Carriage Bolt 3/8-16

Product Description

The VALUE COLLECTION CAI503703250-050BX is a 3/8-16 UNC carriage bolt with a 3-1/4-inch length under head and a square neck designed to resist rotation during installation. Manufactured from Grade 5 steel with a zinc-plated finish, this fastener delivers solid tensile strength and basic corrosion resistance suitable for general structural and mechanical applications. The rounded dome head provides a finished appearance on the clamping face, while the square neck bites into the workpiece to prevent spinning as the nut is tightened. Sold in a minimum order quantity of 50 pieces per order.

This carriage bolt is suited for wood-to-wood, wood-to-metal, and light structural connections in residential and commercial construction, equipment assembly, and general fabrication. Typical applications include framing, decking, machinery guards, railings, and similar through-bolt connections where a smooth bearing surface is required on one side of the joint. Tradespeople, carpenters, millwrights, and general contractors regularly use this bolt size in everyday structural fastening work.

Key Features

• 3/8-16 UNC thread — standard coarse thread for broad nut and hardware compatibility
• 3-1/4-inch length under head — accommodates a range of material stack thicknesses
• Square neck under head — locks into workpiece to prevent rotation during nut tightening
• Grade 5 steel construction — meets medium-strength fastener requirements for structural use
• Zinc-plated finish — provides basic corrosion protection in dry and mildly humid environments
• Minimum order quantity of 50 — suitable for job-lot purchasing and trade volume needs

Compatibility

Designed as a standard 3/8-16 UNC carriage bolt compatible with any 3/8-16 hex nut, coupling nut, or threaded insert meeting UNC thread standards in inch-measurement hardware systems.

Installation Notes

Installation requires drilling a clean through-hole sized to match the bolt shank so the square neck seats flush and locks against rotation. A standard open-end or socket wrench is used to tighten the mating nut from the opposite face while the head is held against the surface. Always verify that material thickness is within the usable thread engagement range before installation. Follow applicable building codes and structural fastener specifications for the project type.