Value Collection CAI50310200-100B Carriage Bolt 5/16-18 2in

Product Description

The VALUE COLLECTION CAI50310200-100B is a Grade 5 steel carriage bolt with a 5/16-18 UNC thread and a 2-inch length under head. The square neck beneath the domed head locks the fastener in place as the nut is tightened, preventing rotation without requiring a wrench on the bolt. A zinc-plated finish provides baseline corrosion resistance for general-purpose indoor and outdoor applications. This bolt is sold in a minimum order quantity of 100 pieces, making it suitable for production assembly, structural framing connections, and maintenance stock.

This carriage bolt fits a wide range of light structural, woodworking, and mechanical assembly applications. The 5/16-18 UNC thread is a standard inch-series coarse thread used across residential and commercial construction, equipment fabrication, and general maintenance work. The square neck is designed to seat into pre-bored square holes in wood or soft substrates, providing a clean, flush dome head on the visible face of the assembly. Installers in construction, HVAC equipment mounting, and general trade work commonly stock this fastener size.

Key Features

• 5/16-18 UNC coarse thread for compatibility with standard inch-series hardware
• 2-inch length under head suits moderate material stack thicknesses
• Square neck seats into wood or soft material to prevent bolt rotation during nut tightening
• Grade 5 steel construction provides medium-strength tensile and shear performance
• Zinc-plated finish offers baseline protection against oxidation and light moisture exposure
• Sold in 100-piece increments for production, maintenance, and stocking purposes

Compatibility

Designed as a standard inch-series carriage bolt for use with 5/16-18 UNC nuts and washers in wood, light metal, and composite structural assemblies.

Installation Notes

Installation requires drilling or boring a hole sized to allow the square neck to seat flush and resist rotation. A standard wrench or socket is applied to the nut side only — no tool is used on the dome head. Follow applicable structural codes for torque and fastener spacing when used in load-bearing connections. Inspect the zinc finish for damage before installation in corrosive or high-moisture environments; consider a stainless or hot-dip galvanized fastener for those conditions.