Value Collection 217138MSC Carriage Bolt 5/8-11 2in Grade 8

Product Description

The VALUE COLLECTION 217138MSC is a Grade 8 alloy steel carriage bolt with a 5/8-11 UNC thread and a 2-inch length under head. Carriage bolts feature a domed head and a square neck that bites into the mating material to prevent rotation during installation, eliminating the need to hold the bolt head with a wrench. This fastener is fully threaded and supplied with a bright, uncoated finish. Grade 8 alloy steel delivers high tensile strength for heavy-duty bolted connections in structural, agricultural, and industrial applications. The bolt conforms to SAE J429, the standard governing the mechanical and performance properties of inch-series fasteners.

This carriage bolt is suited for general structural assembly, equipment framing, and heavy-duty wood-to-metal or metal-to-metal connections where a flush, tool-free head is required on one face of the joint. The 5/8-11 UNC thread size is a common heavy-duty fastener size used across construction, agricultural equipment, and industrial fabrication. It is sold individually and is appropriate for use wherever SAE J429 Grade 8 compliance is specified.

Key Features

• Grade 8 alloy steel construction for high tensile and proof-load strength
• 5/8-11 UNC fully threaded shank, 2 inches length under head
• Square neck prevents bolt rotation during nut tightening without a second wrench
• Bright uncoated finish; suitable for dry or protected environments
• Conforms to SAE J429 fastener standard
• Sold as a single unit with no minimum order requirement beyond one piece

Compatibility

Designed as a standard inch-series carriage bolt for use with 5/8-11 UNC nuts and washers in structural, agricultural, and industrial bolted assemblies requiring SAE J429 Grade 8 compliance.

Installation Notes

Installation is typically performed by maintenance technicians, ironworkers, or general tradespeople using a standard wrench or impact tool on the nut side only. Insert the bolt from the access side so the square neck seats fully into the mating hole before applying torque to the nut. Do not use an impact driver directly on the domed head. Always confirm the mating nut and any washers are rated to the same grade to maintain the integrity of the joint.