Value Collection 218197MSC Carriage Bolt 3/4-10 3-1/2 in Grade 8

Product Description

The VALUE COLLECTION 218197MSC is a fully threaded carriage bolt designed for structural and mechanical fastening applications. It features a 3/4-10 UNC thread with a 3-1/2 inch length under head and a square neck that locks into place against the material surface to prevent rotation during installation. Manufactured from Grade 8 alloy steel with a zinc trivalent chromate finish, this bolt delivers high tensile strength and corrosion resistance suitable for demanding fastening work. It conforms to SAE J429 standards and weighs 0.511 pounds.

This carriage bolt is suited for heavy-duty structural connections in residential and commercial construction, equipment assembly, and fabrication environments. The Grade 8 alloy steel construction makes it appropriate for high-stress joints where a standard Grade 2 or Grade 5 fastener would be undersized. The zinc trivalent chromate finish provides added corrosion protection, making it a practical choice for indoor and moderately exposed installations. It is typically installed by ironworkers, millwrights, general contractors, and skilled tradespeople requiring a reliable through-bolt fastener.

Key Features

• 3/4-10 UNC fully threaded shank for maximum thread engagement throughout the bolt length
• Square neck design locks against substrate to prevent spinning during nut tightening
• Grade 8 alloy steel construction provides high tensile and proof load strength
• Zinc trivalent chromate finish for corrosion resistance
• Meets SAE J429 fastener standard
• 3-1/2 inch length under head suits moderate material stack applications

Compatibility

Designed as a standard SAE J429 Grade 8 carriage bolt for use with 3/4-10 UNC nuts and standard 3/4-inch clearance holes in steel, wood, and composite structural assemblies.

Installation Notes

Installation is typically performed by general contractors, ironworkers, or maintenance tradespeople using standard wrenches or impact tools. Insert the bolt through a pre-drilled clearance hole and seat the square neck into a corresponding square recess or soft material to prevent rotation before tightening the nut. Always torque to specifications appropriate for Grade 8 fasteners per applicable engineering or code requirements. Follow applicable structural and mechanical codes for the specific application.