Value Collection CAI203101500-10LBBX Carriage Bolt 5/16-18

Product Description

The VALUE COLLECTION CAI203101500-10LBBX is a 5/16-18 carriage bolt with a 1-1/2 inch length under head, manufactured from Grade 2 steel with a zinc-plated finish. The square neck beneath the domed head locks the fastener in place as the nut is tightened, preventing rotation without requiring tool access on the bolt side. This fastener is suited for general structural and mechanical assembly tasks where a flush, rounded head profile is required. Plumbers, electricians, HVAC technicians, and general contractors reach for carriage bolts when securing equipment brackets, mounting panels, and joining wood or light steel members.

This carriage bolt is designed for use in residential and light commercial applications. The zinc coating provides basic corrosion resistance suitable for interior and sheltered exterior environments. Common install scenarios include equipment support frames, electrical panel mounting structures, duct support hardware, and general trade rough-in assemblies. The UNC thread standard ensures compatibility with standard inch-system nuts and hardware.

Key Features

• 5/16-18 UNC thread for compatibility with standard inch-series nuts and threaded hardware
• Square neck under domed head prevents rotation during tightening without requiring a wrench on the bolt
• Grade 2 steel construction provides adequate tensile strength for general-duty fastening applications
• Zinc-plated finish offers basic corrosion resistance for interior and protected exterior use
• 1-1/2 inch length under head suits standard panel, bracket, and frame assembly thicknesses

Compatibility

Designed as a standard inch-series carriage bolt compatible with 5/16-18 UNC nuts, washers, and threaded inserts used in general trade and construction assemblies.

Installation Notes

Insert the bolt through a pre-drilled hole sized to allow the square neck to seat and bite into the surrounding material, which prevents spinning during nut installation. Tighten from the nut side only using an appropriate wrench or socket. Follow applicable structural and mechanical codes when specifying fastener grade for load-bearing connections. Do not use in highly corrosive or continuously wet environments without additional corrosion protection beyond the zinc plating.