Value Collection 215517MSC Carriage Bolt 3/8-16 1-3/4 in Grade 8

Product Description

The VALUE COLLECTION 215517MSC is a Grade 8 alloy steel carriage bolt with a 3/8-16 UNC thread and 1-3/4 inch length under head. The domed head and square neck provide a clean bearing surface and resist rotation during installation without requiring a wrench on the bolt head. A zinc trivalent chromate finish delivers corrosion resistance suitable for structural and mechanical assemblies. This bolt is fully threaded along the 1-3/4 inch shank and conforms to SAE J429 standards, making it a specification-grade fastener for demanding load-bearing connections. Installers working in fabrication, construction framing, machinery mounting, and equipment assembly commonly select this bolt where a flush or smooth fastener head is required on the accessible face.

This carriage bolt is suited for through-bolted connections in wood, metal, and composite materials where the square neck seats into a pre-drilled hole to prevent spinning. Typical applications include structural framing, trailer fabrication, farm equipment, conveyor systems, and general industrial assembly. The Grade 8 rating indicates a minimum tensile strength appropriate for high-stress mechanical joints. It is sold in quantities conforming to the stated minimum order quantity and is measured using the inch system throughout.

Key Features

• Grade 8 alloy steel construction for high tensile strength in structural applications
• 3/8-16 UNC fully threaded shank, 1-3/4 inch length under head
• Square neck design locks bolt in place during nut tightening, no wrench needed on head
• Zinc trivalent chromate finish for corrosion resistance
• Conforms to SAE J429 fastener standard
• Domed head provides a smooth, flush appearance on the exposed face

Compatibility

Designed as a standard 3/8-16 UNC Grade 8 carriage bolt for use with matching 3/8-16 hex nuts and washers in through-bolted structural and mechanical assemblies requiring inch-system fasteners.

Installation Notes

Installation is performed by tradespeople and fabricators using standard hand tools. The square neck must be fully seated into a square-punched or broached hole, or drawn into a wood substrate, before torquing the nut to prevent head rotation. Power down or de-energize any associated equipment before servicing fastened assemblies. Follow applicable structural or mechanical codes for torque and joint design requirements.