Value Collection -32164-4 Carriage Bolt 3/8-16 4 in Grade 5

Product Description

The VALUE COLLECTION -32164-4 is a 3/8-16 carriage bolt with a 4-inch length under the head, designed for general fastening applications in structural and mechanical assemblies. Manufactured from Grade 5 steel with a zinc-plated finish, it delivers reliable tensile strength and basic corrosion resistance for indoor and light outdoor use. The square neck under the domed head locks into wood or soft materials to prevent rotation during tightening, eliminating the need for a backup wrench on the bolt side. Electricians, plumbers, HVAC techs, and general contractors commonly use carriage bolts to fasten equipment supports, unistrut assemblies, and structural members.

This bolt is suited for residential and light commercial construction and mechanical installations where a flush, round-head fastener with anti-spin geometry is required. Common applications include fastening pipe hangers, equipment base frames, wood-to-metal connections, and utility supports. The zinc plating provides a barrier against moisture and mild corrosive environments, making it appropriate for indoor mechanical rooms and sheltered exterior installations.

Key Features

• 3/8-16 UNC thread for compatibility with standard 3/8-inch nuts and hardware
• 4-inch length under head suits medium-depth through-fastening applications
• Grade 5 steel construction provides higher tensile strength than standard Grade 2 fasteners
• Square neck prevents bolt rotation when driving the nut from one side
• Zinc-plated finish offers basic corrosion and oxidation resistance
• Inch measurement system, consistent with standard US fastener tooling

Compatibility

Designed as a standard UNC carriage bolt compatible with 3/8-16 hex nuts, coupling nuts, and washers in standard inch-series fastener assemblies.

Installation Notes

Installation is typically performed by the applicable trade or general contractor using a standard wrench or socket on the nut side. Insert the bolt through the pre-drilled hole so the square neck seats fully into the material before applying torque to the nut. Ensure the mating material is appropriate for square-neck engagement to prevent spinning. Follow applicable building codes and structural specifications for fastener grade and spacing requirements.