Value Collection 215298MSC Carriage Bolt 5/16-18 Grade 8

Product Description

The VALUE COLLECTION 215298MSC is a Grade 8 alloy steel carriage bolt with a 5/16-18 UNC thread and a 1-1/2 inch length under the head. It features a square neck design that locks into wood or soft materials during installation, preventing rotation as the nut is driven. The bolt is fully threaded along the shank and carries an uncoated, bright finish. Conforming to SAE J429 fastener standards, it is suited for high-strength structural and mechanical assembly applications. Licensed trades and industrial maintenance professionals use this bolt where tensile strength and secure seating are required.

This carriage bolt is appropriate for residential framing, equipment mounting, and light structural connections where a flush, round-head fastener is preferred. The square neck beneath the head prevents spin-out in wood and composite substrates without requiring a wrench on the bolt head. Its Grade 8 alloy steel construction makes it a reliable choice in demanding mechanical assemblies where standard low-carbon fasteners are insufficient.

Key Features

• Grade 8 alloy steel for high tensile strength in structural and mechanical applications
• 5/16-18 UNC fully threaded shank, 1-1/2 inches length under head
• Square neck design prevents rotation during nut tightening without a secondary tool
• Bright uncoated finish for standard indoor or protected installations
• Conforms to SAE J429 fastener standard

Compatibility

Designed as a standard UNC carriage bolt for use with 5/16-18 compatible nuts and washers in wood, metal, and composite assembly applications.

Installation Notes

Installation is typically performed by carpenters, millwrights, or maintenance technicians using a standard wrench or socket on the mating nut. Seat the square neck fully into the substrate before applying torque to prevent the head from spinning. Follow applicable structural or mechanical assembly codes for proper fastener selection and loading. Inspect for material compatibility before use in corrosive or outdoor environments, as this bolt carries no protective coating.