Value Collection 489128PR Carriage Bolt 1/2-13 7.5 in Grade 2

Product Description

The VALUE COLLECTION 489128PR is a 1/2-13 UNC carriage bolt with a 7.5-inch length under head, manufactured from Grade 2 steel with a zinc-plated finish. The square neck design locks the bolt in place against the material surface during installation, preventing rotation as the nut is tightened. This bolt meets ASTM A307 fastener standards, making it a dependable choice for general-purpose structural and mechanical assembly work. Installation is performed by tradespeople across construction, fabrication, and mechanical maintenance applications where a smooth, round head profile and anti-rotation neck are required.

This carriage bolt is suited for wood-to-wood, wood-to-metal, and light structural connections in residential and commercial construction, equipment mounting, and general fabrication. The zinc plating provides basic corrosion resistance for indoor and dry outdoor environments. The 1/2-13 UNC thread size is a common inch-series specification, compatible with standard 1/2-13 hex nuts and washers. Sold individually; minimum order quantity is 25 pieces per order.

Key Features

• 1/2-13 UNC thread size for compatibility with standard inch-series hardware
• 7.5-inch length under head for applications requiring extended fastener reach
• Square neck design prevents bolt rotation during nut tightening without requiring a wrench on the head
• Grade 2 steel construction meets ASTM A307 fastener standards
• Zinc-plated finish offers basic corrosion resistance for general-purpose use
• Smooth domed head provides a clean, flush appearance on the exposed face

Compatibility

Designed for use with standard 1/2-13 UNC hex nuts and flat washers in general-purpose structural and mechanical fastening applications.

Installation Notes

Installation typically requires a standard wrench or socket to drive the nut while the square neck seats into the material and holds the bolt stationary. Always pre-drill a clean hole sized to the bolt shank diameter to allow the square neck to seat properly. For structural applications, consult applicable building codes and load requirements before specifying fastener grade. Inspect zinc plating for damage before use in corrosion-sensitive environments.