Value Collection 216178MSC Carriage Bolt 1/2-13 3in Grade 8

Product Description

The VALUE COLLECTION 216178MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 1/2-13 UNC thread with a 3-inch length under head, a square neck that locks against the mating surface to prevent rotation during installation, and a bright uncoated finish. The fully threaded shank runs the entire 3-inch length, providing maximum thread engagement for bolted connections. Manufactured to SAE J429 standards, this bolt is suited for structural assemblies, equipment mounting, and heavy-duty mechanical applications where high tensile strength is required. Typically installed by millwrights, ironworkers, and general contractors working on structural or industrial fabrication projects.

This carriage bolt is appropriate for residential and commercial construction, agricultural equipment, trailers, and general structural assemblies requiring a Grade 8 fastener. The square neck seats into pre-drilled square holes or bites into wood and softer substrates to resist spinning without a secondary wrench on the bolt head. Minimum order quantity is 25 pieces per order.

Key Features

• Grade 8 alloy steel construction for high tensile and shear strength
• 1/2-13 UNC fully threaded shank, 3 inches length under head
• Square neck design prevents rotation during nut tightening
• Bright uncoated finish — suitable for use as-is or with additional coatings
• Manufactured to SAE J429 fastener standard
• Sold in multiples of 25 pieces

Compatibility

Designed as an OEM-style replacement or new-installation fastener compatible with standard 1/2-13 UNC threaded nuts, washers, and hardware conforming to SAE J429 inch-series fastener specifications.

Installation Notes

Installation is typically performed by qualified tradespeople or skilled assemblers using standard hand or power tools. Always ensure the mating hole is sized correctly to allow the square neck to seat flush and resist rotation. Torque the nut to values specified by the applicable structural or mechanical engineering standard for Grade 8 fasteners — do not rely on feel alone. Follow all applicable structural and mechanical codes for the jurisdiction and application.