Value Collection 217197MSC Carriage Bolt 5/8-11 3-1/2 in Grade 8

Product Description

The VALUE COLLECTION 217197MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 5/8-11 UNC thread and a fully threaded shank measuring 3.5 inches in length under the head. The square neck beneath the domed head locks into material to prevent rotation during installation without requiring a wrench on the bolt head. Clear zinc chromate finish provides corrosion resistance. This bolt meets SAE J429 standards and is suited for structural assemblies, heavy equipment mounting, and other demanding mechanical connections handled by millwrights, ironworkers, and maintenance mechanics.

This carriage bolt is appropriate for use in residential construction, commercial fabrication, and industrial maintenance settings where a high-strength fastener is required. The 5/8-11 thread size and Grade 8 alloy steel construction make it a common choice for steel-to-steel and steel-to-wood connections where load capacity and fastener integrity are critical. The clear zinc chromate coating provides moderate environmental protection in indoor and sheltered outdoor applications.

Key Features

• Grade 8 alloy steel construction for high tensile and proof load strength
• 5/8-11 UNC fully threaded shank, 3.5 inches length under head
• Square neck prevents bolt rotation during nut tightening
• Clear zinc chromate finish for corrosion resistance
• Meets SAE J429 fastener standard
• Inch measurement system; compatible with standard UNC hardware

Compatibility

Designed as a standard UNC carriage bolt for use with 5/8-11 nuts and corresponding hardware in structural and mechanical assemblies requiring Grade 8 strength fasteners.

Installation Notes

Installation is typically performed by millwrights, ironworkers, or maintenance mechanics using standard hand or power tools. Insert the bolt through the pre-drilled hole so the square neck seats firmly into the material before applying a nut and washer on the opposite side. Tighten the nut to the appropriate torque specification for the application and joint material as defined by the project engineer or applicable codes. Do not use impact tools at high settings in a way that may damage the square neck seating or strip the thread.