The lug nut thread on a 2005 Honda Accord is M12 x 1.5 (metric) with a 60-degree conical seat; typical lug nut hex size is 19 mm and the recommended torque is about 80 ft-lbs (108 Nm).
This specification applies to most 2003–2007 Accord models, including LX, EX and V6 trims, but wheel configurations—especially aftermarket or specialty wheels—can introduce variations. Always verify with the owner's manual or by inspecting the wheel hardware to ensure you use the correct lug nuts for your car.
Thread size and seat type
Honda's service literature for the mid-2000s Accord family lists a 12 mm diameter thread with a 1.5 mm pitch (M12x1.5). The seat is a 60-degree conical (taper) seat, which matches most OEM alloy wheels and typical aftermarket conical-seat nuts. The hex size for removal and installation is commonly 19 mm.
Variations to watch for
While M12x1.5 with a 60-degree conical seat is standard, some aftermarket wheels or hub adapters may use a ball-seat or different thread pitch. Using the wrong nut can damage the wheel or studs, or fail to seat properly.
Always confirm the seat type and thread with the wheel manufacturer or by inspecting the lug nuts that came with the wheels.
How to verify your lug nut size
To confirm the exact lug nut size for your particular car and wheels, use these steps:
- Check the owner's manual or the service manual for the exact lug nut specification for your model year and wheel type.
- Examine an existing lug nut for stamping that might read M12x1.5 or similar.
- Measure the stud diameter and thread pitch with a thread gauge or calipers if you have access to one.
- Compare a suspected lug nut against a known good nut or consult with an auto parts store for a matching size and seat type.
- Verify the seat style (conical/60-degree, ball, or others) to ensure compatibility with your wheel.
Using the correct lug nut size and seat prevents improper seating and ensures safe operation of the wheel assembly.
What to do with aftermarket wheels
If your Accord has aftermarket wheels, lug nut sizes can differ from stock. In such cases, consult the wheel manufacturer’s specifications and Honda’s compatibility guides. When in doubt, bring a wheel, a lug nut, or a photo of the nut to a professional to confirm the right part.
Summary
For a 2005 Honda Accord, the lug nut thread is typically M12 x 1.5 with a 60-degree conical seat, using a 19 mm hex wrench, and tightened to about 80 ft-lbs (108 Nm). Always verify against your manual and the specific wheels you use, especially if you have aftermarket components.