Value Collection 489072PR Carriage Bolt 3/8-16 1-1/2 in Square Neck

Product Description

The VALUE COLLECTION 489072PR is a 3/8-16 carriage bolt with a 1-1/2 inch length under the head, designed for general fastening applications in construction, woodworking, and light structural assemblies. It features a square neck that locks into wood or soft materials to prevent rotation during tightening. The bolt is manufactured from Grade 2 steel and finished with a zinc plating that provides basic corrosion resistance. Conforming to ASTM A307 standards, this fastener is well-suited for low-strength bolting applications where high-tensile performance is not required. Installation requires no special tooling beyond a standard wrench or socket.

This carriage bolt is appropriate for residential and light commercial framing, decking, fence construction, and general metalwork where a smooth, domed head finish is preferred. The zinc plating makes it suitable for interior applications and limited exposure environments. Sold in a minimum order quantity of 100 pieces, it is a practical choice for contractors, maintenance crews, and tradespeople who need reliable standard-size fasteners in volume.

Key Features

• 3/8-16 UNC thread for broad compatibility with standard nuts and hardware
• 1-1/2 inch length under head suits common fastening depths in wood and light metal
• Square neck prevents bolt rotation when driven into wood without a secondary tool
• Grade 2 steel construction meets ASTM A307 fastener standards
• Zinc plating provides basic corrosion resistance for interior and low-exposure use

Compatibility

Designed as a standard UNC 3/8-16 carriage bolt compatible with matching hex nuts, washers, and threaded inserts conforming to inch-system fastener standards.

Installation Notes

Carriage bolts are typically installed by tradespeople, carpenters, or general contractors using a standard wrench or socket on the nut side — the domed head requires no tool when the square neck seats properly in wood. Always pre-drill a clean hole to match the bolt diameter to ensure the square neck draws flush without splitting the material. Follow applicable building codes, including IBC or local structural requirements, when used in load-bearing or structural connections.