Value Collection 489040PS Carriage Bolt 1/4-20 8 in Square Neck

Product Description

The VALUE COLLECTION 489040PS is a 1/4-20 carriage bolt with an 8-inch length under head, designed for general-purpose fastening applications in construction, woodworking, and structural assemblies. The bolt features a smooth, domed head and a square neck that bites into the material to prevent rotation during installation, eliminating the need to hold the bolt head while tightening the nut. Manufactured from Grade 2 steel with a zinc-plated finish, it meets ASTM A307 standards for low-carbon steel fasteners. This bolt is a standard choice for trade professionals and contractors working on light structural and utility connections.

This carriage bolt is suited for residential and light commercial construction, wood-to-wood and wood-to-metal connections, and general utility fastening where a flush, round head profile is required. The 1/4-20 UNC thread and 8-inch shank length accommodate thicker material stacks or applications requiring extended grip length. The zinc plating provides a basic level of corrosion resistance for indoor and sheltered outdoor environments.

Key Features

• 1/4-20 UNC thread size for compatibility with standard 1/4-inch nuts and hardware
• 8-inch length under head for extended grip in thick material assemblies
• Square neck design prevents bolt rotation during nut tightening without a wrench on the head
• Grade 2 steel construction meets ASTM A307 fastener standard
• Zinc-plated finish provides basic corrosion resistance for sheltered applications

Compatibility

Designed as a standard 1/4-20 UNC carriage bolt for general-purpose fastening in wood and light structural assemblies where ASTM A307 Grade 2 fasteners are specified.

Installation Notes

Installation is typically performed by carpenters, contractors, or general tradespeople using standard hand tools. Power down or de-energize any adjacent systems before working in areas with electrical components. Pull the square neck flush into the material to lock the bolt before applying torque to the nut. Do not use impact tools at excessive torque that could strip the Grade 2 threads or deform the square neck seat.