Value Collection 217378MSC Carriage Bolt 5/8-11 8 in Grade 8

Product Description

The VALUE COLLECTION 217378MSC is a fully threaded carriage bolt designed for high-strength fastening applications in structural, mechanical, and industrial assemblies. It features a 5/8-11 UNC thread and an 8-inch length under head, with a square neck that locks into place to prevent rotation during installation. Built from Grade 8 alloy steel with a bright, uncoated finish, this bolt delivers the tensile strength required for demanding load-bearing connections. It meets SAE J429 standards, making it a dependable choice for applications where fastener grade and thread specification matter.

This carriage bolt is suited for use in heavy-duty structural connections, equipment fabrication, timber framing, and industrial maintenance work. The fully threaded 8-inch shank maximizes thread engagement across the full length of the bolt, which is useful in applications requiring nuts at variable positions. The uncoated finish is appropriate for indoor or controlled-environment installations where corrosion exposure is limited. Trade professionals in construction, manufacturing, and mechanical maintenance will find this bolt appropriate for standard UNC fastening scenarios requiring Grade 8 strength.

Key Features

• 5/8-11 UNC fully threaded shank provides maximum thread engagement over the full 8-inch length
• Grade 8 alloy steel construction meets SAE J429 tensile strength requirements
• Square neck design prevents bolt rotation during nut tightening without requiring a wrench on the head
• Bright, uncoated finish suitable for dry or controlled-environment installations
• 8-inch length under head accommodates thicker material stacks and variable nut positioning
• Sold individually, allowing single-unit procurement for repair and replacement work

Compatibility

Designed as a standard UNC carriage bolt for use with 5/8-11 hex nuts and washers in structural and mechanical assemblies where Grade 8 alloy steel fasteners are specified.

Installation Notes

Installation is typically performed by construction tradespeople, millwrights, or maintenance mechanics using standard hand or power tools. Insert the bolt through a pre-drilled hole sized for a 5/8-inch shank so the square neck seats firmly into the material and prevents spinning. Apply the washer and nut to the threaded end and torque to the value specified by the applicable structural or equipment standard. Do not use impact drivers in a manner that could damage the square neck seating or strip the thread.