Value Collection 218137MSC Carriage Bolt 3/4-10 2in Grade 8

Product Description

The VALUE COLLECTION 218137MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications in structural, mechanical, and industrial assemblies. Measuring 3/4-10 thread size with a 2-inch length under head, this fully threaded bolt features a square neck that locks into place during installation to prevent rotation without requiring a wrench on the bolt head. The zinc trivalent chromate finish provides corrosion resistance in exposed or moderately harsh environments. Manufactured to SAE J429 standards, this bolt is well-suited for trade professionals, fabricators, and maintenance technicians who need a reliable, code-referenced fastener for demanding load applications.

This carriage bolt is used in a wide range of residential, commercial, and industrial fastening scenarios. Common applications include timber framing, equipment mounting, steel fabrication, and heavy-duty structural connections where a smooth domed head and anti-rotation neck are required. The fully threaded 2-inch shank provides consistent thread engagement across the full length under head, making it appropriate for through-bolt applications with standard nuts and washers. It is a single-piece package suitable for spot replacement or low-quantity installations.

Key Features

• Grade 8 alloy steel construction for high tensile strength and shear resistance
• Fully threaded 2-inch length under head for maximum thread engagement
• Square neck design prevents bolt rotation during nut tightening without additional tooling on the bolt
• Zinc trivalent chromate finish provides corrosion resistance in exposed environments
• Manufactured to SAE J429 standard for recognized material and dimensional compliance
• UNC thread standard (3/4-10) for broad compatibility with standard nuts and hardware

Compatibility

Designed as an OEM-style replacement or standard-stock carriage bolt for use with any 3/4-10 UNC-threaded nut and hardware conforming to SAE J429 fastener standards.

Installation Notes

Installation is performed by trades professionals including ironworkers, carpenters, and millwrights using standard hand or impact tools. Always de-energize or shut down the equipment or structure section being fastened before beginning work. Insert the square neck fully into the mating hole to seat the anti-rotation feature before applying torque to the nut. Follow applicable structural or mechanical codes for torque requirements and fastener grade specifications relevant to the assembly.