The lug nuts are M12 x 1.5 with a 60-degree conical seat, and they require a 19 mm socket. This specification applies to the stock five-lug wheels used on the 2005 TSX. When replacing, match the thread size, seat type, and wheel compatibility.
The 2005 Acura TSX uses a standard five-lug pattern common to many Honda/Acura models of the era. Below are the core specifications and guidance to ensure you select the correct lug nuts for maintenance or wheel upgrades.
Lug Nut Specifications
Before reviewing the specifications, note that the following details summarize the essential characteristics of the lug nuts used on this vehicle.
- Thread size: M12 x 1.5 (metric)
- Seat type: 60-degree conical (tapered) seat
- Hex size (nut wrench): 19 mm
- Wheel pattern: 5-lug configuration (five studs per wheel)
- Material/finish: typically steel with zinc coating for OEM hardware
These specifications apply to the U.S.-market 2004–2008 TSX models with standard factory wheels. If you replace wheels or install aftermarket ones, confirm that the lug nuts match the new wheel’s seat type and thread pitch.
Additional considerations
When replacing lug nuts or tightening them after a wheel change, follow proper torque guidelines to avoid warping rotors or loosening fasteners. If in doubt, consult your vehicle’s owner manual or a professional technician.
Why the correct size matters
Using the correct lug nut size ensures proper seating, prevents thread damage, and maintains wheel security on the road. A mismatch in thread pitch or seat type can lead to improper engagement and potential wheel detachment.
Summary
For a 2005 Acura TSX, use lug nuts with an M12 x 1.5 thread, 60-degree conical seat, and a 19 mm hex size. This combination matches the factory hardware on the stock five-lug wheels, and ensures safe, secure mounting of the wheels.