Dorman 611-031 Wheel Lug Nut - Front Left or Rear Left

Dorman 611-031 Wheel Lug Nut Overview

Dorman 611-031 is a steel wheel lug nut built for classic vehicle wheel service where the correct thread direction, seat style, and thread size matter. It features a zinc finish, fine 1/2-20 SAE threads, and a 60-degree conical seat for a secure wheel-to-hub interface on select vintage applications.

Compatible With select Jeep CJ5, Buick LeSabre, Pontiac Catalina, and Oldsmobile 88 applications, this Dorman wheel lug nut is also listed for several Cadillac, Pontiac, and Oldsmobile models from the 1950s and 1960s. The part number 611-031 is a direct reference for buyers searching for a left-hand thread lug nut with a standard open-end design.

Key Features

• Steel construction for strength and long service life
• Zinc finish for added corrosion resistance
• Fine 1/2-20 SAE thread specification
• Counterclockwise thread direction
• 60-degree conical seat for proper wheel mating
• Open-end design with 13/16 in hex size
• Standard end type with no washer required

Detailed Product Description

Dorman 611-031 is engineered as a replacement wheel lug nut for older vehicles that use left-hand threads and a 60-degree conical seat. The carbon steel construction is tested to demanding automotive industry standards to support strength, longevity, and safety in wheel fastening applications. With its 0.5 in thread diameter, 20 threads per inch, and 0.625 in overall length, this lug nut is specified for precise fitment on the listed classic platforms.

This part cross-references 558-031 and 1201N for the same application. It is a practical choice for restoration work and wheel hardware replacement on vehicles such as the 1959-1966 Jeep CJ5, 1961-1963 Buick LeSabre, and 1950-1963 Pontiac Catalina when the original thread direction and seat geometry must be matched.

What This Lug Nut Helps Address

• Worn, rounded, or damaged wheel lug nuts
• Incorrect thread direction on left-hand thread wheel hardware
• Improper wheel seating caused by the wrong seat angle
• Corrosion on zinc-plated wheel fasteners
• Fitment issues during classic vehicle wheel restoration

Installation Notes and Tips

• Verify the wheel-to-lug nut mating surface before installation.
• Confirm the vehicle uses 1/2-20 fine threads and a left-hand thread pattern.
• Use the correct 13/16 in hex tool for removal and tightening.
• Check that the wheel seat is a 60-degree conical style before installation.
• Follow the vehicle manufacturer’s torque specifications during final tightening.

Quality Assurance

Dorman manufactures this wheel lug nut from carbon steel and tests it to demanding automotive industry standards for strength, longevity, and safety. The Dorman 611-031 is built to meet the needs of select classic Buick, Cadillac, Jeep, Oldsmobile, and Pontiac wheel applications.