ordinary hex nut - more widely used, characterized by the fastening force is relatively large, the disadvantage is that in the installation of the installation to have enough operating space to, installation can be used with a live wrench or open-ended wrench, or glasses wrench above the wrenches need a lot of operating space.Widely used and one of the most common fasteners in general.
cylindrical head hex nut - is widely used in all screws, because he fastening force is relatively large, the use of hexagon wrenches can be operated, the installation is very convenient, almost used in a variety of structures, the appearance of a more beautiful and neat, the disadvantage is that the tightening force tip is lower than the hexagon, in addition to repeated use of the easy to damage the hexagonal caused by the inability to dismantle.
Plate head hexagon socket - rarely used mechanically, mechanical properties as above, mostly used in furniture, the main role is to increase the contact surface with wooden materials and increase the appearance of ornamental.
headless hexagon - certain structures must be used, such as the need for great tightening force of the top wire structure, or need to hide the cylindrical head place.
Countersunk Hexagon Socket - mostly used in power machinery, the main role of the same as the hexagon socket.
Nylon lock nut - inlaid nylon rubber ring in the hexagon surface, to prevent thread loosening of the structure, strong power machinery used.
Flange nut - mainly play the role of increasing the contact surface with the workpiece, mostly used in pipelines, fasteners have been some stamping and casting parts.