Value Collection 215538MSC Carriage Bolt 3/8-16 2in Grade 8

Product Description

The VALUE COLLECTION 215538MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications requiring a smooth, round head and a square neck that resists rotation during installation. This bolt features a 3/8-16 UNC thread and is fully threaded along its 2-inch length under head. The uncoated, bright finish leaves the alloy steel surface bare, making it suitable for use where coating thickness would affect fit or where a secondary finish will be applied. Grade 8 classification meets SAE J429 standards, indicating a tensile strength rating appropriate for structural and heavy-duty mechanical assemblies. It is typically installed by millwrights, ironworkers, equipment technicians, and general contractors.

This carriage bolt is suited for structural connections, machinery mounting, wood-to-metal assemblies, and general industrial fastening where a flush, buttonhead profile is required on the bearing surface. The square neck beneath the head embeds into wood or seats in a square hole in metal to prevent spinning during nut tightening. Applications span residential and commercial construction framing, trailer fabrication, agricultural equipment repair, and heavy-duty fixture mounting. No specific compatible model families were identified in the product data.

Key Features

• Grade 8 alloy steel construction meets SAE J429 for high tensile strength fastening
• 3/8-16 UNC fully threaded shaft along the full 2-inch length under head
• Square neck beneath the round head prevents bolt rotation during tightening
• Bright uncoated finish suitable for secondary coating or paint application
• Inch measurement system for compatibility with standard UNC hardware

Compatibility

Designed as a standard 3/8-16 UNC carriage bolt compatible with any application requiring a Grade 8 alloy steel fastener with a square neck and 2-inch length under head per SAE J429 specifications.

Installation Notes

Installation is performed by inserting the bolt through a pre-drilled hole sized to allow the square neck to seat flush, preventing rotation. A flat washer and hex nut are typically applied to the threaded end and tightened with a wrench or socket set. Always ensure the mating material is capable of withstanding the clamping load appropriate for a Grade 8 fastener. Follow applicable structural codes and torque guidelines specified in the project drawings or engineering documentation.