A specialized nut used to fasten wheels to automotive studs. It typically features a conical or spherical seating surface that centers the wheel on the hub as it is tightened, ensuring proper alignment and distributing the clamping force evenly.
Torque the lugnuts to 100 foot-pounds in a star pattern so the rotor doesn't warp.
Never use oil or anti-seize on lugnut threads unless specified by the manufacturer, as it drastically alters the torque-tension relationship and can cause over-tightening.
Also heard as
- Wheel nut
- Lug nut
Related terms
Stud
A headless rod threaded at both ends or along its full length, used with nuts or screwed into a tapped hole.
Preload
The tension created in a bolt by tightening it, which clamps the joint and keeps it from slipping or opening.
Torque-tension
The relationship between the torque applied to a fastener and the preload it produces, dominated by friction.