As structural parts, high-strength bolts undertake important load-bearing tasks, and their quality directly affects the safety and stability of the entire structure. Therefore, it is very important to carry out quality inspection on high-strength bolts. Several commonly used high-strength bolt quality inspection methods are introduced below. 1. Appearance inspection First, maijin can observe the appearance of high-strength bolts with the naked eye to check whether there are cracks, deformation, wear and other problems. At the same time, it is also necessary to pay attention to whether the size of high-strength bolts, such as diameter and length, meet the requirements. 2. Hardness testing The hardness of high-strength bolts is one of the important indicators to measure their quality. A hardness tester can be used to test the hardness of high-strength bolts, and the choice of hardness tester should be determined according to the material and diameter of the high-strength bolts. 3. Torque detection The torque of high-strength bolts is another important indicator. Use a torque wrench to test the torque of the high-strength bolts to check whether they meet the requirements. During the detection process, care should be taken to keep it stable and avoid excessive force, so as not to cause damage to high-strength bolts. 4. Non-destructive testing Non-destructive testing is a commonly used quality testing method for high-strength bolts. Non-destructive testing of high-strength bolts can be carried out by means of ultrasonic flaw detection, magnetic particle flaw detection, and radiographic flaw detection to determine whether there are defects that cannot be observed by the naked eye. 5. Mechanical properties testing The mechanical properties of high-strength bolts are also one of the important indicators to measure their quality. The mechanical properties of high-strength bolts can be tested by tensile test, impact test, hardness test and other methods to determine whether they meet the requirements. In short, it is very important to carry out quality inspection on high-strength bolts. The appropriate detection method can be selected according to the specific situation to ensure the quality and safety of high-strength bolts. At the same time, during use, attention should be paid to maintenance and regular inspections, and problems can be found and solved in time to ensure the long-term use of high-strength bolts.