Value Collection 489077PR Carriage Bolt 3/8-16 2-3/4in Grade 2

Product Description

The VALUE COLLECTION 489077PR is a 3/8-16 UNC carriage bolt with a 2-3/4 inch length under head, square neck, and zinc-plated Grade 2 steel construction. Carriage bolts are designed for through-bolting applications where a smooth, domed head is required on the finished side and the square neck locks into wood or soft material to prevent rotation during assembly. This fastener meets ASTM A307 standards and is sized for general-purpose structural and mechanical connections. It is commonly installed by contractors, electricians, plumbers, and general tradespeople in a wide range of light-duty fastening applications.

This carriage bolt is suited for residential and light commercial construction and repair work. Typical applications include securing wood framing, attaching hardware, and assembling equipment where a smooth fastener head is needed on the exposed surface. The zinc plating provides basic corrosion resistance for indoor and sheltered outdoor environments. Sold individually with a minimum order quantity of 50 pieces.

Key Features

• 3/8-16 UNC thread size for compatibility with standard nuts and hardware
• 2-3/4 inch length under head for through-bolting medium-thickness stock
• Square neck prevents bolt rotation during nut tightening without a wrench on the bolt head
• Grade 2 steel construction meets ASTM A307 fastener standards
• Zinc-plated finish provides basic corrosion resistance in sheltered environments
• Smooth dome head leaves a clean, snag-free surface on the finished side

Compatibility

Designed as a general-purpose replacement or stock carriage bolt for standard 3/8-16 UNC fastener applications in wood, light steel, and composite assemblies.

Installation Notes

Install with the domed head on the finished or exposed face and drive the square neck into a pre-drilled hole sized to the bolt shank to lock it against rotation. Thread a 3/8-16 nut and washer onto the opposite end and tighten with a standard wrench or socket. Power down or de-energize any adjacent equipment before fastening in electrical or mechanical enclosure applications. Follow applicable building codes and torque guidelines specified by the project engineer or equipment manufacturer.