A lug nut is a small but strong fastener that holds a wheel onto a vehicle. It is screwed onto the bolts of the wheel hub, keeping the wheel securely attached to the axle. Lug nuts are typically made of metal and are designed to withstand the pressure and force of driving. They need to be tightened properly to ensure the wheel stays in place and should be checked regularly for safety. When changing a tire, lug nuts must be loosened and then tightened again after the new tire is in position.

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