Pro Comp PXA26104 Wheel Lug Nuts

Pro Comp wheel lug nuts are accessories that complete your wheel installation with style. These spline drive lug nuts are available in kits with valve stems and a key or individually. Pro Comp steel lug nuts are offered in chrome and black finishes to customize your ride. Get a professional looking install for your wheels with Pro Comp lug nuts.

A lug nut is a nut fastener with one rounded or conical (tapered) end. Used on steel and most aluminium wheels. A lug nut is used to secure a wheel to threaded wheel studs and thereby to a vehicle’s axles. Some designs use lug bolts or wheel bolts instead of nuts. These screw into a tapped (threaded) hole in the wheel’s hub or brake drum or brake disc.

The conical lug’s taper is normally 60 degrees (although 45 degrees is common for wheels designed for racing applications), and is designed to help centre the wheel accurately on the axle, and to reduce the tendency for the nut to loosen due to fretting induced precession, as the car is driven. One popular alternative to the conical lug seating design is the rounded, hemispherical, or ball seat. Automotive manufacturers such as Audi, BMW, and Honda use this design rather than a tapered seat, but the nut performs the same function.

Older style (non-ferrous) alloy wheels use nuts with a 13 to 25 mm (1⁄2 to 1 in) cylindrical shank slipping into the wheel to centre it and a washer that applies pressure to clamp the wheel to the axle.

Wheel lug nuts may have different shapes. Aftermarket alloy and forged wheels often require specific lug nuts to match their mounting holes. You may require a new set of lug nuts when the wheels are changed.

There are four common lug nut types:

1. cone seat
2. bulge cone seat
3. under hub cap
4. spline drive.

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