Value Collection 3GBC906C0408 Carriage Bolt 3/8-16 4.5in

Product Description

The VALUE COLLECTION 3GBC906C0408 is a fully threaded carriage bolt designed for general fastening applications requiring a clean, low-profile head and a square neck that locks into wood or soft materials to prevent rotation during installation. Built to Grade 1006-1050 steel with a galvanized zinc-plated finish, this bolt offers basic corrosion resistance suitable for light-duty structural connections. The 3/8-16 UNC thread and 4.5-inch length under head make it a common choice for timber framing, gate hardware, dock construction, and similar applications where a nut-and-washer assembly is used on the through side. Compliant with ASME B18.5 fastener standards.

This carriage bolt is suited for residential and light commercial construction, woodworking, fencing, and outdoor structure assembly. The square neck seats flush as it is drawn into a pre-drilled hole, eliminating the need for a wrench or socket on the bolt head. It is a standard inch-system fastener with UNC threading, making it compatible with standard 3/8-16 hex nuts, flange nuts, and washers. Minimum order quantity is 50 pieces, sold as individual units per package.

Key Features

• 3/8-16 UNC fully threaded shaft with 4.5-inch length under head
• Square neck prevents rotation when drawing the bolt into wood or composite materials
• Grade 1006-1050 steel construction for consistent tensile and shear performance
• Galvanized zinc-plated finish provides basic corrosion protection for outdoor and exposed applications
• Meets ASME B18.5 fastener standard for dimensional consistency
• Inch-system measurement, compatible with standard UNC hardware

Compatibility

Designed as an OEM-style replacement or new-installation fastener for applications requiring a 3/8-16 UNC carriage bolt per ASME B18.5 dimensional standards.

Installation Notes

Installation is typically performed by carpenters, general contractors, or maintenance trades using standard hand tools. Drill a clean through-hole sized to the bolt shank diameter before inserting the bolt so the square neck seats properly and prevents spinning. Apply a flat washer and nut on the through side and tighten with a wrench or socket driver. Follow applicable building codes for structural fastener spacing and load requirements.