@zhaozhiactive 4 days, 10 hours ago
Heavy hex bolt is a kind of bolts, bolts, mechanical parts, cylindrical threaded fasteners with nuts. A fastener consisting of a head and a screw (cylinder with external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. This connection method is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.
There are many names for bolts, and each person’s name may be different. Some people call it a screw, some call it a bolt, and some call it a fastener. Although there are too many names, they all mean the same thing. They are all bolts. Bolts are the general term for fasteners. Bolts are tools that use physical and mathematical methods of oblique rotation and friction of objects to gradually tighten objects and parts.
Bolts are essential in daily life and industrial production. Bolts are also called industrial meters. It can be seen that bolts are widely used. The application range of bolts includes: electronic products, mechanical products, digital products, electrical equipment, electromechanical products.
The performance grades of steel structure connecting bolts are divided into more than 10 grades such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which bolts of grade 8.8 and above are made of low carbon alloy steel or medium carbon steel , And after heat treatment (quenching, tempering), usually called high-strength bolts, the rest are usually called ordinary bolts. The bolt performance grade label consists of two numbers, which represent the nominal tensile strength value and yield ratio of the bolt material.
Preventive measures for heavy hex bolts: check the newly replaced connecting rod bolts every time they are repaired. Pay attention to whether there are cracks or dents on the head of the bolt, the guide part and the thread, and whether the tooth profile and pitch of the thread are abnormal. If there is an abnormal situation, it should not be used. When assembling the connecting rod cover, please use a torque wrench to tighten it according to the specified standard to prevent the torque from being too large or too small. Please use the connecting rod bolts produced by the supporting factory.