Add the flat washer - increase the contact area, reduce the pressure, prevent loosening, but this method is frequently removed, and is limited to prevent the structure of small screw loosening, and can not play a strong effect of preventing screw loosening 
2. Self lock nut - is self-locking by friction, so that it can prevent the relative rotation of the nut and bolt, play the role of the screw to prevent loosening, the disadvantage is that its cost is high. 
3.. Cotter pin -- is to play the role of fixing screws, but in the process of mechanical movement, in this way, the pin may be damaged, the screw nut is easy to wear, damage the screw teeth, easy to cause the screw and screw teeth slippage, screw loose performance is not stable. 
4. Double nut -- the use of tightening force to make the double nut to achieve anti-loosening effect, increase the weight, is limited to relatively weak loosening, and can not play a strong effect to prevent loosening, the actual improper use, can not play the role of anti-loosening, screw anti-loosening performance is not stable. 
5. Wire locking -- It is one of the traditional methods to prevent looseness, which is widely used in aircraft related fields. However, the wire locking may be damaged in this method, and the scope of use is limited. 
6. U-shaped nut -- Change the shape of the nut, directly destroy the nut screw, indirectly destroy the bolt screw teeth, and eventually lead to the bolt fall off, screw anti-release performance is not stable. 
7. Sealing tape -- leakage proof, lock resistance, and in the process of screw and nut docking is more laborious, anti loose performance is not stable. The above is a few kinds of ways to deal with screw loosening, although they have certain effects, but the shortcomings are also obvious. And while the iron is hot than their own hard, this time not to consider Suzhou Anzhikou Hardware Technology CO., LTD. ‘s screw, it can use the reaction of raw materials, make the bolts and nuts in the process of locking by squeezing against vibration and impact resistance, can use repeatedly disassembling, make the screw has the effect of locking and leak proof. Screws can significantly improve production efficiency, reduce production costs, a wide range of use, any shape of the screw can be handled; Light weight, no rust; Can be repeatedly disassembled and used; Anti-loose screw performance is stable, is an excellent anti-loose screw!