Hexagon nut non-standard parts related classification:
1. Ordinary Hexagon - widely used, characterized by a relatively large fastening force, the disadvantage is that there must be enough operating space in the installation, you can use a live spanner, open end wrench or glasses wrench when installing, the above wrenches need to be large The operating space.
2. Cylindrical head Hexagon - is the most widely used of all screws, because it has a relatively large fastening force, can use the Allen wrench to operate, very convenient when installed, almost used in a variety of structures, the appearance of a more beautiful, The disadvantage is that the tightening force is slightly lower than the outer hexagon, and the repeated use of the inner hexagon causes the inner hexagon to be unable to be disassembled.
3, pan head Hexagon - rarely used on machinery, mechanical properties as above, mostly used in furniture, the main role is to increase the contact surface with the wooden material and increase the appearance of ornamental.
4. Headless Hexagon - Some structures must be used, such as a top wire structure that requires a lot of top tension, or a place where the cylinder head needs to be hidden.
5, countersunk head Hexagon - mostly used in power machinery, the main role of the same with the internal hexagon.
6、Nylon Locking Nut—Inlaid with a nylon rubber ring in the hexagonal surface to prevent the loose structure of the thread, and it is used on strong power machinery.
7, flange nuts - mainly play a role in increasing the contact surface with the workpiece, mostly used in the pipeline, fasteners have been some stampings and castings.
8, ordinary hex nut - the most widely used, is also one of the most common fasteners.