AUTOPTIM M12x1.25 Lug Nuts 20-Pack Black Mag Flat Seat — Closed-End, Triple Chrome

A 20-piece set of AUTOPTIM M12 x 1.25 closed-end, one-piece black mag flat-seat lug nuts engineered to replace OEM flat-seat nuts on select Nissan and Infiniti wheels.

These lug nuts are made for vehicles that require a flat (mag) 90° seat and the M12 x 1.25 thread pitch. Each nut is a single-piece, cold-forged steel construction with triple chrome finish and closed ends to resist corrosion and debris. The dimensions—13/16" (21 mm) hex, 1.47" (37 mm) height, 1.2" (30 mm) width—match common OEM specifications so you can swap them directly if your wheels use a flat seat design.

Will these lug nuts fit my Nissan or Infiniti?

If your vehicle’s wheels use an OEM flat (mag) seat and M12 x 1.25 threads, these AUTOPTIM lug nuts are designed to fit. They are compatible with many Nissan and Infiniti models; always confirm your wheel’s seat type (flat vs conical) before purchasing. Do not use these on wheels that require conical or tapered nuts.

• M12 x 1.25 thread pitch—standard for specified Nissan/Infiniti models
• Flat 90° mag seat—matches OEM flat-seat wheels only
• Physical size: 13/16" (21 mm) hex, 1.47" (37 mm) height, 1.2" (30 mm) width
• Closed-end design prevents dirt and moisture ingress

How durable and secure are these one-piece lug nuts?

These nuts use a one-piece construction rather than two-piece designs, reducing potential weak points that can crack or loosen. They are cold-forged and heat-treated for strength, then finished with triple chrome plating for corrosion resistance. The closed end and precision threads help maintain a tight, reliable fit during regular driving.

• One-piece construction resists cracking and loosening
• Cold-forged, heat-treated steel for structural strength
• Triple chrome finish enhances rust resistance and longevity
• Closed ends keep out contaminants and moisture

What are the exact specifications and what should I check before buying?

Confirm thread pitch, seat style, and the wrench size required to install these nuts. These AUTOPTIM lug nuts are closed-end with an M12 x 1.25 thread, 13/16" (21 mm) hex head, 1.47" (37 mm) height, and 1.2" (30 mm) width. Make sure your wheels are flat-seat (mag) and that the nut dimensions are compatible with any wheel covers or caps you use.

• Thread: M12 x 1.25 (metric)
• Seat: flat 90° (mag) — not compatible with conical seats
• Hex size: 13/16" (21 mm); overall height: 1.47" (37 mm)
• Sold as a set of 20 black lug nuts, closed-end style

What kind of maintenance and service can I expect?

Routine inspection for tightness and corrosion is recommended as with any wheel fastener. The chrome finish reduces rust buildup, and the closed-end design limits exposure to moisture. AUTOPTIM also offers a 12-month customer support period if you encounter fitment or quality questions.

• Inspect torque and condition at regular service intervals
• Closed ends reduce internal corrosion—clean exterior only
• AUTOPTIM provides 12 months of customer support/service
• Use recommended torque values for your vehicle when installing

Who is this for: Drivers who own Nissan or Infiniti vehicles that specifically require M12 x 1.25 flat-seat lug nuts and want a durable, OEM-style replacement in a black mag finish. Ideal for owners replacing worn or corroded nuts, restoring wheel appearance, or upgrading to a closed-end, one-piece design for increased longevity. If your wheels use a tapered/conical seat, choose a compatible alternative instead.