The most common lug nut size on modern Acura models is M12x1.5 with a 19mm hex head, but the exact size depends on the model, wheel, and seat type. Always verify your vehicle’s specifications before buying or replacing lug hardware.
This article explains the typical sizes you’re likely to encounter, how to confirm the correct size for your Acura, and best practices for installation and safety.
Common lug nut sizes for modern Acura vehicles
Here are the sizing details you’re most likely to encounter on current Acura sedans and SUVs. This overview focuses on stock wheels and helps you identify the right nut if you’re replacing hardware.
Key specs to know before reading the list
Most Acura lug nuts use a conical (60-degree) seat, with M12x1.5 threading and a 19mm across-flats hex size. These specs cover the majority of recent models, including TLX, MDX, RDX, and ILX, though exceptions exist for certain wheels or trims.
- Thread size: M12 x 1.5 (diameter 12 mm with 1.5 mm thread pitch) for most 5-lug Acura wheels.
- Seat type: conical (tapered) seat to match stock wheels.
- Across-flats (hex) size: typically 19 mm for stock Acura lug nuts.
For the vast majority of Acura models, these three specifications align. Variations can occur with aftermarket wheels or specialized trims, so always confirm with your manual or wheel manufacturer.
How to verify the exact lug nut size for your Acura
Use these steps to determine the correct size for your specific car and wheels before replacement or installation.
- Check the owner's manual or service documentation for lug nut size and torque specifications.
- Inspect the current lug nuts for stamped sizing information (if present).
- Measure the lug nut across flats with a caliper or ruler to confirm the hex size (19 mm is common on Acura factory hardware).
- Contact a dealership Parts or Service department with your VIN to obtain the exact spec for your model-year and trim.
- If unsure, bring a known correct lug nut to compare or purchase a replacement set labeled for your model.
Verifying the size before purchasing or installing helps prevent misfits and ensures proper thread engagement and wheel retention.
Torque and installation best practices
Proper torque ensures safe wheel retention and reliable performance. The following guidelines apply to most Acura models, but always confirm the exact value in your owner's manual for your model and year.
- Common torque range: about 80–100 ft-lbs (108–135 Nm) for most modern Acura models; some SUVs may require the higher end of the range.
- Use a calibrated torque wrench and tighten in a star pattern to the specified torque.
- After initial tightening, re-torque after 50–100 miles (80–160 km) to account for seat and lug nut settlement.
- Avoid using a power impact wrench for final torque; use a controlled torque wrench to prevent over- or under-tightening.
Following the manufacturer’s torque specification and procedure is critical for wheel safety and the longevity of lug nuts and studs.
Summary
In summary, most modern Acura lug nuts are M12x1.5 with a 19mm hex head and a conical seat, but exact sizing can vary by wheel and trim. Always verify the specific size and torque for your model in the owner’s manual or with your dealer, and follow proper installation and re-torque guidelines to ensure safe driving and reliable wheel retention.