Value Collection 218277MSC Carriage Bolt 3/4-10 Grade 8

Product Description

The VALUE COLLECTION 218277MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 3/4-10 UNC thread and measures 5-1/2 inches in length under the head. The bolt is fully threaded with a square neck that locks against the material being fastened, preventing rotation during installation. Clear zinc chromate finish provides basic corrosion resistance. This fastener meets SAE J429 standards and is well suited for structural and mechanical assemblies where a flush, smooth dome head profile is required.

Grade 8 alloy steel carriage bolts are commonly used in heavy-duty wood-to-metal and metal-to-metal connections in construction, equipment fabrication, and agricultural applications. The square neck seats into pre-drilled square holes or bites into wood substrates to resist turning as the nut is tightened. The 5-1/2 inch length under head accommodates moderate-depth assemblies. This bolt is sold individually and is an appropriate replacement or addition to any fastener inventory requiring SAE J429-compliant Grade 8 hardware.

Key Features

• Grade 8 alloy steel construction for high tensile strength and shear resistance
• 3/4-10 UNC fully threaded shank, 5-1/2 inches length under head
• Square neck design resists rotation during nut torquing without a wrench on the bolt head
• Clear zinc chromate finish provides light corrosion protection
• Meets SAE J429 fastener standard
• Inch measurement system, UNSPSC Code 31161603

Compatibility

Designed as a standard SAE J429 Grade 8 carriage bolt suitable for structural, construction, and equipment assemblies requiring 3/4-10 UNC fasteners with a square neck and fully threaded shank.

Installation Notes

Installation is performed by tradespeople and maintenance technicians using standard hand tools. Insert the bolt through a pre-drilled hole sized for the square neck to seat properly and prevent spinning, then tighten the nut from the opposite side. Ensure the mating material and hole preparation are appropriate for Grade 8 hardware to take full advantage of the bolt's tensile rating. Follow applicable structural or mechanical codes for torque and joint specifications.