Dorman 712-645A4 Wheel Lug Nut

Dorman 712-645A4 Wheel Lug Nut

Dorman 712-645A4 is a metric wheel lug nut built from medium carbon steel with a 14x1.5 thread, 19 mm hex, and 60-degree conical seat. It is finished in black and uses a flattop hex nut design for a clean, custom-style appearance on select vehicles.

Key Features

• Medium carbon steel construction for wheel fastening strength
• M14 x 1.5 fine thread with clockwise thread direction
• 19 mm hex size for standard service tools
• 60-degree conical seat for proper wheel-to-nut contact
• Black finish for a uniform appearance
• Flattop hex nut design for a custom racing-style look
• Compatible with select Cadillac, Chevrolet, GMC, Ford, Toyota, and other applications
• Part number 712-645A4 for ordering and fitment lookup

Detailed Description

This Dorman wheel lug nut is engineered for vehicles that use an M14-1.50 metric thread and a conical seat wheel interface. The black finish and flattop profile give the wheel hardware a more refined appearance while the steel construction supports secure wheel retention. Dorman 712-645A4 is a direct-fit style lug nut for many GM trucks and SUVs, including Chevrolet Silverado, Tahoe, Suburban, Avalanche, GMC Sierra, Yukon, and Cadillac Escalade applications, along with select Ford, Toyota, Lexus, and Dodge models.

The part is vacuum nickel plated for scratch resistance and corrosion protection, then finished for a custom look. It is also designed to accept Dorman interchangeable colored aluminum wheel fastener caps, sold separately, if a different visual style is desired. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Solve

• Damaged or worn wheel lug nuts with stripped threads
• Corrosion on original wheel fasteners
• Loose or inconsistent wheel clamping from incorrect seat style
• Mismatch between replacement hardware and factory wheel appearance
• Service issues on vehicles using M14x1.5 conical-seat lug nuts

Installation Notes and Tips

• Verify wheel mating surface and seat style before installation.
• Use the correct 19 mm socket to avoid rounding the hex.
• Confirm the vehicle uses right-hand, clockwise thread direction.
• Torque lug nuts to the vehicle manufacturer specification in a star pattern.
• Inspect threads and wheel seats for wear or damage before reuse.

Quality Assurance

Dorman tests this lug nut for corrosion resistance and finish durability to support long-term service use. The part number 712-645A4 is backed by Dorman’s product engineering and application validation for listed fitments.