The standard lug nut thread size for a 2012 Honda Civic is 12 x 1.5 mm, and you’ll typically use a 19 mm socket to tighten or remove the lug nuts.
In more detail, the 2012 Civic (ninth generation) uses a 5-lug, 114.3 mm bolt pattern. The wheel studs are M12 x 1.5 with a 60-degree conical (tapered) lug nut seat, and the common lug nuts are sized to fit a 19 mm wrench. While these specs cover the majority of trims, there can be variations with aftermarket wheels or accessories—always verify against your owner’s manual or a trusted parts source when changing wheels or lug hardware.
Key wheel-fastener specifications
The following list highlights the core specs you’ll need to know when dealing with wheels on a 2012 Civic.
- Lug thread size: 12 x 1.5 mm
- Bolt pattern: 5 x 114.3 mm
- Lug nut seat: 60-degree conical (tapered)
- Lug nut socket size: 19 mm across flats
These specifications apply to the common LX, EX, and EX-L trims. The Civic Si and some aftermarket setups can share the same basics but may require verification due to wheel/tiring changes or adapters.
How to verify in your specific car
Check the owner's manual and door placard
For absolute certainty, consult the vehicle’s owner’s manual and the door placard near the driver's door, which lists the correct bolt pattern, lug thread size, and recommended lug nut specifications for your exact configuration.
Summary
A 2012 Honda Civic typically uses lug nuts with a 12 x 1.5 mm thread, a 5 x 114.3 mm bolt pattern, a 60-degree conical seat, and a 19 mm hex for the lug nuts. Always confirm with official sources if you’re using aftermarket wheels or making changes, as variations can exist by trim or accessory setups.