Value Collection 1424C8 Carriage Bolt 1/4-20 Grade 8

Product Description

The VALUE COLLECTION 1424C8 is a fully threaded carriage bolt designed for structural fastening applications requiring high strength and corrosion resistance. Manufactured from Grade 8 alloy steel with a zinc trivalent chromate finish, this bolt meets SAE J429 standards. It features a 1/4-20 UNC thread with a 1-1/2 inch length under head and a square neck that resists rotation during installation without requiring a wrench on the bolt head. Machinists, maintenance technicians, and general contractors rely on this fastener for assemblies where reliable clamp load and finish durability are required.

This carriage bolt is suited for use in metal-to-metal and metal-to-wood structural connections in both light industrial and commercial applications. The Grade 8 alloy steel construction delivers higher tensile strength than Grade 5 or Grade 2 fasteners, making it appropriate for high-load joints and vibration-prone assemblies. The zinc trivalent chromate finish provides a baseline level of corrosion protection for indoor and sheltered outdoor environments. This bolt is sold in multiples of 10 units per order.

Key Features

• Grade 8 alloy steel construction for high tensile strength and load capacity
• Zinc trivalent chromate finish for corrosion resistance in sheltered environments
• Square neck under head prevents rotation during nut tightening
• Fully threaded along the 1-1/2 inch shank length for maximum thread engagement
• Meets SAE J429 fastener standard
• 1/4-20 UNC thread form for broad compatibility with standard hardware

Compatibility

Designed as a standard UNC carriage bolt compatible with any 1/4-20 threaded nut or tapped hole conforming to inch-series fastener specifications.

Installation Notes

Carriage bolts are installed by driving the square neck into a pre-drilled hole to seat and lock the head, then threading a nut from the opposite side. Always use a properly sized hole to ensure the square neck seats flush and prevents spin-out. Confirm torque requirements using published SAE J429 Grade 8 specifications for the application. Use appropriate personal protective equipment when working with fasteners under high clamp load.