A 'drum brake bolt' is an essential fastening component used in the braking system of vehicles. These bolts ensure that the drum brake is securely attached to the axle. Without proper fastening, the drum brake can shift, leading to reduced braking efficiency or even system failure. Proper torque and securing of these bolts are crucial for the safety and reliability of the vehicle. Regular inspection and maintenance of these bolts ensure optimal functioning of the braking system. They are often made from strong materials to withstand high pressure and wear.