Dorman 611-178 Wheel Lug Nut

Dorman 611-178 Wheel Lug Nut for Ford, Chevrolet, and GMC

Dorman 611-178 is a steel wheel lug nut built for secure wheel retention on select Ford Mustang, Chevrolet Astro, and GMC Safari applications. It features a 1/2-20 fine thread, 60-degree conical seat, and zinc-plated finish for service in demanding wheel and tire applications.

Key Features

• Steel construction for strength and durability
• 1/2-20 SAE fine thread with clockwise thread direction
• 60-degree conical seat for proper wheel mating surface contact
• External thread, open-end design
• 13/16 in hex size for standard service tools
• Zinc-plated finish
• Fits vehicles that use a 1/2-20 lug nut specification

Detailed Description

This Dorman wheel lug nut, part number 611-178, is engineered for applications that require a 1/2-20 SAE lug nut with a conical seat and right-hand thread. The carbon steel construction is tested to automotive industry standards for strength, longevity, and safety. It is a direct-fit hardware choice for 1994-2004 Ford Mustang, 1996-2002 Chevrolet Astro, and 1996-2002 GMC Safari wheel service where the wheel and lug nut seat style match.

This part cross-references Ford F7ZZ1012AA and Spectra Premium 98135 for the same application.

What It Helps Address

• Stripped or worn wheel lug nuts
• Corrosion on existing wheel hardware
• Improper wheel-to-lug seat contact
• Loose or inconsistent wheel fastening caused by damaged threads
• Replacement needs during wheel service on Ford Mustang, Chevrolet Astro, or GMC Safari

Installation Notes and Tips

• Verify the wheel uses a 60-degree conical seat before installation.
• Confirm the vehicle uses 1/2-20 right-hand threads.
• Check lug nut-to-wheel mating surface for proper and safe fitment.
• Use the correct 13/16 in hex tool during removal and tightening.
• Follow the vehicle manufacturer’s torque specification and recheck torque after service.

Quality Assurance

Dorman manufactures this lug nut from carbon steel and tests it to demanding automotive industry standards to support strength, longevity, and safety. Part number 611-178 is built for consistent wheel hardware service on the listed Ford, Chevrolet, and GMC applications.