Flat washers can relieve pressure, increase friction, seal, shock absorption, and secure. Spring washers can increase the friction between nuts and bolts, prevent bolt loosening, and improve the stability of the connection.

Tightening the tires and brake system: Fasteners are also used to tighten the tires and brake system, which is a key factor in driving safety for automobiles. They ensure that the tires and brake system are securely installed on the vehicle to prevent accidents during driving.