Value Collection CAI202503000-10LBBX Carriage Bolt 1/4-20

Product Description

The VALUE COLLECTION CAI202503000-10LBBX is a 1/4-20 carriage bolt with a 3-inch length under the head, manufactured from Grade 2 steel with a zinc-plated finish. The square neck beneath the domed head locks into a pre-drilled hole in wood or soft material, preventing rotation during nut tightening without the need for a wrench on the bolt head. The zinc coating provides a base level of corrosion resistance suitable for general indoor and light outdoor applications. This fastener follows Unified National Coarse (UNC) thread standards and is measured by length under head per standard practice.

This carriage bolt is suited for general construction, woodworking, and light structural assembly tasks. It is commonly used to fasten wood components together or to attach wood to metal in applications such as framing, decking, fencing, and equipment mounting. Tradespeople in construction, HVAC equipment mounting, and general mechanical assembly will encounter this fastener type in everyday service work. The 1/4-20 UNC thread size makes it compatible with standard 1/4-20 hex nuts and washers available from any hardware supplier.

Key Features

• 1/4-20 UNC thread for compatibility with standard 1/4-20 nuts and hardware
• 3-inch length under head accommodates moderate material stack-ups
• Square neck locks against wood or soft substrate to resist rotation during installation
• Grade 2 steel construction meets general-purpose tensile requirements
• Zinc-plated finish provides basic corrosion resistance for dry and light-duty environments

Compatibility

Designed as a general-purpose 1/4-20 UNC carriage bolt for use with standard 1/4-20 hex nuts, flat washers, and lock washers in wood-to-wood or wood-to-metal fastening applications.

Installation Notes

Installation requires a pre-drilled hole sized to allow the square neck to seat flush and resist rotation — typically a hole diameter matched closely to the bolt shank. Drive the bolt through from the head side, seat the square neck fully into the material, then apply a washer and nut on the threaded end and tighten with a wrench or socket. Do not use an impact driver directly on the domed head, as this can damage the head profile and prevent proper seating of the square neck.