Value Collection 218138MSC Carriage Bolt 3/4-10 2in Grade 8

Product Description

The VALUE COLLECTION 218138MSC is a fully threaded carriage bolt designed for structural fastening applications requiring high tensile strength. Sized at 3/4-10 UNC thread with a 2-inch length under head, this bolt features a square neck that locks into place against the mating surface to prevent rotation during tightening. Manufactured from Grade 8 alloy steel with a bright uncoated finish, it meets SAE J429 standards for mechanical properties. Machinists, millwrights, maintenance technicians, and general contractors install this type of hardware where high-load, vibration-resistant connections are required.

This carriage bolt is suited for heavy-duty structural assemblies in residential, commercial, and industrial settings. Typical applications include wood-to-wood connections, machinery mounting, conveyor frames, and equipment fabrication. The fully threaded shank provides maximum thread engagement across the full 2-inch length under head, making it well-suited for thin-stack assemblies or applications where adjustable clamping depth is needed. It is sold and packaged as a single unit.

Key Features

• 3/4-10 UNC thread size for high-load fastening applications
• 2-inch fully threaded length under head provides full thread engagement throughout the shank
• Square neck design resists rotation during nut installation without a secondary tool on the bolt head
• Grade 8 alloy steel construction meets SAE J429 mechanical standards
• Bright uncoated finish suitable for dry or controlled indoor environments
• Inch-system dimensions for compatibility with standard UNC hardware

Compatibility

Designed as an OEM-style replacement or standard-fitment carriage bolt for any structural or mechanical assembly specifying a 3/4-10 UNC, 2-inch, fully threaded, Grade 8 square-neck carriage bolt per SAE J429.

Installation Notes

Installation is typically performed by maintenance technicians, millwrights, or construction tradespeople using standard hand or power tools. Always de-energize or lock out equipment before installing or removing fasteners in mechanical assemblies. The square neck must seat fully into the mating hole to prevent bolt rotation — use an appropriately sized square-hole plate or fitting where required. Torque to the assembly specification for 3/4-10 Grade 8 hardware as defined by the governing engineering or construction standard for the application.