Value Collection 237034MSC Carriage Bolt 5/16-18 3/4 in Grade 5

Product Description

The VALUE COLLECTION 237034MSC is a 5/16-18 carriage bolt designed for secure fastening in structural and general-purpose applications. This bolt features a smooth domed head with a square neck that bites into the material during installation, preventing rotation without requiring a wrench on the bolt head. It is fully threaded along its 0.75-inch length under the head and meets SAE J429 Grade 5 strength requirements. The zinc-plated clear chromate finish provides corrosion resistance for use in standard indoor and light outdoor environments. Fastener specialists, general contractors, and maintenance technicians typically source this bolt for metal-to-wood and metal-to-metal assemblies.

This carriage bolt suits a wide range of residential and light commercial construction, equipment assembly, and maintenance tasks where a flush, tamper-resistant fastener head is required. The square neck locks into pre-drilled square holes or bites into softer substrate materials such as wood, making it a common choice for framing connections, fence hardware, and equipment mounting. Sold individually with a minimum order quantity of 100 pieces to support project-scale purchasing.

Key Features

• 5/16-18 UNC thread size with fully threaded shank for maximum engagement
• 0.75-inch length under head suits shallow fastening applications
• Square neck prevents bolt rotation during nut tightening without a second wrench
• Grade 5 steel construction meets SAE J429 mechanical strength standards
• Zinc-plated clear chromate finish adds corrosion resistance in dry and light-moisture environments
• Inch measurement system, compatible with standard UNC tooling and hardware

Compatibility

Designed as a standard UNC carriage bolt replacement or new-installation fastener compatible with 5/16-18 threaded nuts, washers, and pre-drilled hardware conforming to SAE J429 inch-series specifications.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole and seating the square neck into the material to prevent spinning, then tightening a mating nut from the opposite side using a standard wrench or socket. Ensure the hole diameter matches the bolt shank diameter to allow proper square-neck engagement. Follow applicable building codes and fastener torque guidelines for Grade 5 hardware when used in structural connections. Minimum order quantity is 100 pieces per order.