Value Collection 218168MSC Carriage Bolt 3/4-10 2-3/4 in Grade 8

Product Description

The VALUE COLLECTION 218168MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 3/4-10 UNC thread with a 2-3/4 inch length under head and a square neck that locks the bolt in place when drawn into a mating hole, preventing rotation during installation. The uncoated bright finish leaves the steel surface bare, making it suitable for applications where additional plating or coating will be applied. This bolt is fully threaded along its shank and conforms to SAE J429 standards. It is a single-unit fastener suited for structural, mechanical, and fabrication work requiring a high-grade, reliable connection.

Carriage bolts in this size and grade are commonly used in heavy structural assemblies, timber connections, machinery mounting, and industrial fabrication. The Grade 8 rating makes this bolt appropriate for high-load, high-stress applications where a standard Grade 5 fastener would be insufficient. Professionals working in construction, steel fabrication, and equipment maintenance regularly specify this bolt configuration for joints that demand consistent clamping force and shear resistance.

Key Features

• Grade 8 alloy steel construction for high tensile and proof load capacity
• 3/4-10 UNC fully threaded shank for full thread engagement
• 2-3/4 inch length under head for precise fitment in structural assemblies
• Square neck design prevents bolt rotation during nut tightening
• Uncoated bright finish compatible with post-installation coating or plating
• Conforms to SAE J429 fastener standard

Compatibility

Designed as a standard UNC carriage bolt for use in structural and mechanical assemblies requiring a 3/4-10 thread pattern and Grade 8 alloy steel strength rating. Verify mating nut thread class and hole diameter before installation.

Installation Notes

Installation is typically performed by maintenance technicians, structural ironworkers, or millwrights using standard hand tools and torque wrenches. Power down and de-energize any adjacent equipment before beginning fastener work in mechanical assemblies. The square neck must be fully seated into the mating material to prevent spinning during torque application. Always use a Grade 8 compatible nut and hardened washer to match the bolt grade and avoid joint slippage.