Value Collection 218874MSC Carriage Bolt 1/4-20 3/4 in Grade 5

Product Description

The VALUE COLLECTION 218874MSC is a 1/4-20 UNC carriage bolt designed for general structural and mechanical fastening applications. It features a ribbed neck under the domed head that bites into the mating material to prevent rotation during installation, eliminating the need for a wrench on the bolt end. Manufactured from Grade 5 steel with a zinc-plated clear chromate finish, it provides a balance of tensile strength and corrosion resistance suited to indoor and light-duty outdoor assemblies. The bolt measures 3/4 inch in length under head with 3/8 inch of thread, conforming to SAE J429 standards.

This carriage bolt is used in wood-to-wood, wood-to-metal, and light structural connections across residential construction, equipment fabrication, and general maintenance work. The partially threaded shank and ribbed neck make it a practical choice for situations where through-bolt installations require a flush, non-turning head on one face. Installers working on framing, brackets, enclosures, and similar assemblies will find this size commonly specified. Sold individually with a minimum order quantity of 100 units.

Key Features

• Ribbed neck prevents bolt rotation without a secondary tool on the head side
• Grade 5 steel construction meets SAE J429 tensile strength requirements
• Zinc-plated clear chromate finish provides corrosion resistance in dry and light-exposure environments
• Partially threaded shank with 3/8 inch of UNC thread engagement
• 1/4-20 thread size in the commonly stocked 3/4 inch under-head length

Compatibility

Designed as a standard SAE J429-compliant 1/4-20 UNC carriage bolt compatible with any application requiring a 1/4 inch diameter partially threaded carriage bolt with a ribbed neck and 3/4 inch length under head.

Installation Notes

Installation is performed by driving the bolt through a pre-drilled clearance hole sized for a 1/4 inch fastener, then seating the ribbed neck into the material so the head sits flush and cannot spin. A standard hex nut and wrench are used to tighten from the threaded end. Follow applicable structural fastening codes and torque guidelines specified by the assembly designer for Grade 5 hardware. Inspect the mating surface to ensure the ribbed neck fully embeds before applying final torque.