Car bolts are often known as a threaded connector. The car screws from one end have one head. These screws and seals are often inserted from the assembly parts and then fastened using the nut. The car beads are important components of the automotive industry. These connectors are usually hexagonal or square and have a thread hole to twist the bolt that attaches the structure. In the assembly process of the car, many car screws are used. They are often used for rotation and lock function. The car bolt is critical for safe performance of vehicles with approximately 45 % of the total market share.