Value Collection 217168MSC Carriage Bolt 5/8-11 Grade 8

Product Description

The VALUE COLLECTION 217168MSC is a Grade 8 alloy steel carriage bolt with a 5/8-11 UNC thread and a length under head of 2.75 inches. It features a square neck beneath the round head, which bites into the mating material to prevent rotation during tightening without requiring a wrench on the bolt head. Fully threaded along the entire shank length, this bolt is suited for high-strength structural and mechanical fastening applications. It carries a bright, uncoated finish and conforms to SAE J429 standards for mechanical properties. Licensed trades and industrial maintenance crews rely on this fastener for demanding load-bearing connections.

This carriage bolt is used in structural assemblies, heavy equipment, timber framing, and general fabrication work where a flush, round-head profile is required on the exposed face. The fully threaded design provides flexibility in clamping depth across a range of material thicknesses. Its Grade 8 rating makes it appropriate for high-stress joints in both residential and light commercial construction as well as industrial maintenance settings.

Key Features

• Grade 8 alloy steel construction for high-strength fastening
• 5/8-11 UNC fully threaded shank for maximum thread engagement
• Square neck prevents bolt rotation during nut tightening
• 2.75 inches length under head suits a range of material stack-up thicknesses
• Bright, uncoated finish — suitable for dry or protected indoor applications
• Conforms to SAE J429 fastener standard

Compatibility

Designed as a standard UNC 5/8-11 carriage bolt for use with matching 5/8-11 hex nuts and washers in structural, fabrication, and general mechanical assembly applications.

Installation Notes

Installation is typically performed by maintenance technicians, ironworkers, or carpenters depending on the application. Insert the bolt from the face side so the square neck seats into the material before applying a hex nut and washer from the back. Use a torque wrench to achieve the proper clamp load specified by the joint design engineer — do not rely on feel alone for Grade 8 hardware. Always ensure the mating material is capable of accepting the square neck without over-deforming before final torque is applied.