What size are the lug nuts on a 2018 Chevy Impala?
The stock lug nuts are 14mm hex (M14x1.5) with a 60-degree conical seat, used on the 2018 Impala’s factory wheels.
Many owners wonder if wheel upgrades or different trims change the lug nut size. Here’s what you need to know to identify and service lug nuts on the 2018 Impala. The details below cover stock wheels, but aftermarket setups may use different specifications.
Stock specifications
Key specifications to identify and install lug nuts on the 2018 Impala’s factory wheels.
- Hex size: 14 mm
- Stud thread: M14 x 1.5
- Seat style: 60-degree conical
- Bolt pattern: 5x120 mm
These specifications apply to most stock configurations. If your vehicle has aftermarket wheels or a different trim, verify compatibility with the wheel manufacturer or dealership before purchasing replacements.
Notes on maintenance and alternatives
Always torque lug nuts to the OEM specification and re-torque after wheel installation or rotation to ensure proper clamping and safety. If you replace lug nuts with non-OE hardware, ensure the dimensions and seat type match the wheel studs and seat requirements.
Summary
For a 2018 Chevy Impala with stock wheels, lug nuts generally use a 14 mm hex size (M14x1.5), with a 60-degree conical seat and a 5x120 bolt pattern. If you’re using aftermarket wheels, confirm the precise lug nut size and seat type with the wheel manufacturer or your dealer.
