Value Collection 218167MSC Carriage Bolt 3/4-10 2-3/4 in Grade 8

Product Description

The VALUE COLLECTION 218167MSC is a Grade 8 alloy steel carriage bolt with a 3/4-10 UNC thread and a length under head of 2.75 inches. The square neck beneath the domed head locks into material during installation, resisting rotation without a wrench on the bolt. Full threading runs the entire shank length, giving maximum engagement across a wide range of material thicknesses. A zinc trivalent chromate finish provides corrosion resistance in exposed or moderately demanding environments. This fastener meets SAE J429 standards and is suited for high-strength structural and mechanical assemblies where a smooth, rounded head profile is required.

Carriage bolts of this size and grade are commonly used in heavy-duty wood-to-metal connections, equipment frames, trailer assemblies, and structural brackets. The 3/4-10 coarse thread is a standard size in industrial, agricultural, and construction applications. Grade 8 alloy steel provides elevated tensile and proof-load strength compared to Grade 2 or Grade 5 fasteners, making it appropriate for high-load joints. Licensed tradespeople, millwrights, ironworkers, and general contractors typically specify Grade 8 hardware where joint integrity under dynamic or heavy static loads is critical.

Key Features

• Grade 8 alloy steel construction for high tensile strength per SAE J429
• 3/4-10 UNC coarse thread, fully threaded for maximum engagement flexibility
• Square neck under dome head prevents rotation during nut tightening
• Zinc trivalent chromate finish for corrosion resistance
• Length under head: 2.75 inches
• Sold individually (package quantity: 1)

Compatibility

Designed as a standard 3/4-10 UNC carriage bolt for use in any application requiring a SAE J429 Grade 8 fully threaded fastener with a square-neck dome head.

Installation Notes

Installation typically requires drilling a hole sized to allow the square neck to seat flush and lock against the substrate material. Torque the nut from the nut side only — the square neck holds the bolt stationary. Always consult applicable structural codes and engineering specifications when using high-strength fasteners in load-bearing assemblies. Inspect threads and mating surfaces for damage before installation.