Value Collection 489127PR Carriage Bolt 1/2-13 7 in Square Neck

Product Description

The VALUE COLLECTION 489127PR is a 1/2-13 UNC carriage bolt with a 7-inch length under head, square neck, and zinc-plated Grade 2 steel construction. The square neck seats into wood or soft materials to prevent rotation during installation, eliminating the need for a wrench on the bolt head. Manufactured to ASTM A307 standards, this fastener delivers reliable tensile performance for general structural and mechanical assembly applications. The zinc finish provides baseline corrosion resistance suitable for interior and light-duty exterior use. Installers in construction, HVAC equipment mounting, plumbing support work, and general trade fabrication will find this bolt appropriate for standard load-bearing connections.

This carriage bolt is suited for residential and light commercial construction, wood framing connections, equipment anchoring, and general structural assembly where a 1/2-13 UNC thread pattern is specified. The 7-inch under-head length accommodates thicker material stacks or applications requiring extended fastener reach. It conforms to ASTM A307 fastener standards, making it appropriate for use where that specification is called out in a project or installation requirement.

Key Features

• 1/2-13 UNC thread size for compatibility with standard nuts and threaded hardware
• 7-inch length under head for deep material penetration or thick material stacks
• Square neck prevents bolt rotation during tightening without a second tool on the head
• Grade 2 steel construction meets ASTM A307 tensile requirements
• Zinc-plated finish provides corrosion resistance for general-use environments
• Inch measurement system with length specified as length under head

Compatibility

Designed as a standard UNC carriage bolt for use with 1/2-13 nuts and compatible hardware in wood, steel, or composite material assemblies where ASTM A307 Grade 2 fasteners are acceptable.

Installation Notes

Installation is performed by driving the square neck flush into the mating material so the head seats flat, then threading a compatible 1/2-13 nut from the opposite side. Use a standard wrench or socket on the nut only — applying torque to the round head will not drive the fastener. Verify that Grade 2 steel meets the load requirements of your application before installation, as higher-strength grades may be required for structural connections under specific building codes. Confirm fastener length is appropriate for the total material thickness plus nut and washer stack before ordering.