Value Collection 215297MSC Carriage Bolt 5/16-18 1-1/2 in Grade 8

Product Description

The VALUE COLLECTION 215297MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 5/16-18 UNC thread at 1-1/2 inches length under head and is fully threaded along its entire shank. The square neck under the domed head prevents rotation during installation, eliminating the need for a wrench on the bolt side. A zinc trivalent chromate finish provides corrosion resistance in standard service environments. This fastener meets SAE J429 standards and is suited for use by maintenance technicians, millwrights, fabricators, and general tradespeople working with structural or mechanical assemblies.

This carriage bolt is appropriate for residential and light commercial construction, equipment fabrication, and mechanical assembly applications where a flush, rounded head profile is required. The fully threaded design maximizes engagement across the full shank length, making it well suited for thinner material stacks. It is measured in the inch system and conforms to UNC thread standards, ensuring compatibility with standard SAE nuts and hardware commonly stocked in trade environments.

Key Features

• Grade 8 alloy steel construction for high tensile and shear strength
• 5/16-18 UNC fully threaded shank, 1-1/2 inches length under head
• Square neck under head prevents bolt rotation without a secondary tool
• Zinc trivalent chromate finish for corrosion protection
• Meets SAE J429 fastener standard
• Inch system measurement; compatible with standard SAE hardware

Compatibility

Designed for use with standard 5/16-18 UNC SAE nuts and washers in structural, mechanical, and general fabrication assemblies requiring a Grade 8 alloy steel carriage bolt.

Installation Notes

Installation is typically performed by maintenance technicians, fabricators, or general tradespeople using standard SAE hand tools. Insert the bolt through a pre-drilled clearance hole so the square neck seats fully into the material to prevent rotation, then thread and torque the nut from the opposite side. Always ensure hole diameter matches the bolt shank to allow the square neck to seat correctly. Follow applicable structural or mechanical codes for proper torque and joint specifications.