The use of hexagonal nuts in conjunction with screws, bolts, and screws serves to connect and tighten mechanical components. Divided into A-grade hexagonal nuts, B-grade hexagonal nuts, and C-grade hexagonal nuts
Material: galvanized, stainless steel
Standards: European Standard, American Standard, National Standard
Level: 4.8-Grade, 8.8-Grade
1. Ordinary outer hexagon - widely used, characterized by a relatively large tightening force, but the disadvantage is that there needs to be sufficient operating space during installation. Monkey wrenches, open-end wrenches, or eyeglass wrenches can be used during installation, all of which require a large operating space
2. Cylindrical head inner hexagon - is the most widely used among all screws because it has a relatively large tightening force and can be operated with an inner hexagon wrench. It is easy to install and is almost used in various structures. Its appearance is relatively beautiful and neat, but the disadvantage is that the tightening force is slightly lower than the outer hexagon. In addition, repeated use can easily damage the inner hexagon and make it impossible to disassemble
3. Pan head inner hexagon - rarely used mechanically, with the same mechanical properties as before, mostly used in furniture. Its main function is to increase the contact surface with wooden materials and enhance the aesthetic appearance
4. Headless inner hexagon - must be used on certain structures, such as top screw structures that require significant tightening force or places where cylindrical heads need to be hidden
5. Countersunk hexagonal head - mostly used in power machinery, its main function is the same as that of hexagonal head
6. Nylon locking nut - a structure with nylon rubber ring embedded in the hexagonal surface to prevent thread loosening, used in strong power machinery. 7. Flange nut - mainly plays a role in increasing the contact surface with the workpiece, and is mostly used in pipelines, fasteners, and some stamped and cast parts
7. Ordinary hex nuts - the most widely used and generally one of the most common fasteners