Hexagon Head Bolt is one of the main products of our company, the material is 304, 201316 stainless steel; it is manufactured in strict accordance with Din933 standard, and the specifications are complete, from M4 to M36. When using the Hexagon Head Screw, if the machine is running, the engine is running fast or the piston is burned in the cylinder, it will cause the Hexagon Screw Head to break. Another fundamental issue is the material of the bolt. If the use environment is not within the scope of the material, the bolt will also break. Therefore, bolts with appropriate strength should be selected according to their own needs. Our Company