The Infiniti G37 (2008–2013) typically uses M12 x 1.25 lug nuts with a 60-degree conical seat and a 19 mm wrench size for the OEM wheels. If you’re working with aftermarket wheels, verify the exact specs for those parts to ensure proper fit and safety.
G37 lug nut size: the basics
Technical specifications for OEM lug nuts
These are the standard specifications you will usually encounter on factory G37 wheels (model years 2008–2013):
- Thread size: M12 x 1.25
- Seat type: 60-degree conical seat (tapered)
- Nut style: acorn lug nut
- Wrench size: 19 mm across flats
- Locking vs non-locking: many G37s use standard non-locking nuts; some trims may use locking nuts
These specs cover the typical OEM setup. If your vehicle uses a non-standard wheel package or aftermarket hardware, confirm the exact lug nut type before replacements.
Aftermarket wheels and compatibility
When installing aftermarket wheels, sizes and seat angles can vary. Always source lug nuts that match the wheel manufacturer’s specs and the hub geometry.
- Thread size variation: while M12 x 1.25 is common, some aftermarket wheels use M12 x 1.5. Check the wheel documentation to be sure.
- Seat type: most aftermarket wheels use a conical or ball seat; ensure the nut matches the wheel’s seat style (60-degree cone or other as required).
- Wrench size: aftermarket lug nuts may require a different tool size (often 19 mm, 21 mm, or other), depending on the nut design.
Using the wrong lug nut can damage the wheel or hub and compromise safety. If in doubt, consult the wheel manufacturer or a qualified technician.
How to verify your lug nut size
If you’re unsure about the exact lug nut size on your G37, use these quick checks:
- Consult the owner’s manual or dealer parts diagram for your exact year and wheel type.
- Measure the lug nut’s thread diameter and pitch to confirm M12 x 1.25 or another standard.
- Measure the lug nut’s hex size across flats to determine the correct wrench size (OEM is typically 19 mm).
Always ensure the lug nuts fit both the wheel and the hub and are torqued to the manufacturer’s specification.
Summary
The Infiniti G37’s OEM lug nuts are normally M12 x 1.25 with a 60-degree conical seat and a 19 mm wrench size. If you’re using aftermarket wheels or locking lug nuts, verify the exact specs with the wheel or nut manufacturer to ensure proper fit and safety.