In daily life, you should find bolts and nuts in the connection, there will be a flat ring shape of things – Washers. Washers are placed in the bolts, screws or nuts support surface and connecting parts of the fastener between the surface. The most commonly used is Flat Washers and Helical Spring Lock Washers. So when do we use Flat Washers or Helical Spring Lock Washers?

I. Flat Washers

The principle of Flat Washers is to increase the surface area of the connected parts, reduce the pressure per unit area and protect the surface of the connected parts from being damaged. It mainly has decompression, increase friction, sealing, shock absorption, fixed role.

For example, there are hundreds and thousands of different types of fasteners used in an automobile. Flat washers combination screws are widely used in automobile fasteners. Nowadays, the requirements of automobile lightweight are becoming higher and higher. In the body and even chassis structure, a large number of lightweight connection technologies and structures are adopted. In order to reduce the compressive stress on the bearing surface of the bolted joint and prevent crushing and permanent plastic deformation, Flat Washers are generally needed to be added.

In some cases, such as cars, where most stamping and welding parts are used, the position of the hole between the two parts cannot be accurately matched. In order to ensure that the bolt holes between the two connectors can correspond one by one, we need to increase the diameter of the hole to compensate for the position deviation of the hole. It is necessary to increase the Flat Washers when the bolt holes exceed the standard requirements, the compressive stress exceeds the strength of the material. The most commonly used dimensions of Flat Washers is the internationally recognized DIN125 standard. Here are its specifications.

II. Helical Spring Lock Washers

Helical Spring Lock Washers are mainly to increase the friction between nuts and bolts. They added safeguards to prevent the loosening of the fastening bolts caused by vibration of the equipment in operation. They have anti-seismic, anti-loose effect.

For example, the bolts connecting the motors and the bases should generally add Helical Spring Lock Washers, because the motors vibrates, the nut will loosen if there is no Helical Spring Lock Washers. Helical Spring Lock Washers are usually attached to fasteners for equipment with vibration.

Another example is the commonly used furniture table, the connection of bolts and nuts are to use spring gaskets on the fixed leg of the table. Because if there is a gap between bolts and nuts fastening, unavoidably swaying furniture is likely to cause loosening of screws after a long time of use . And wood is thermal expansion and contraction, the main role of the Helical Spring Lock Washers is to give buffer space and rebound after being compressed. The most commonly used dimensions of Helical Spring Lock Washers is the internationally recognized DIN127 standard. Here are its specifications.

Washers are greatly affected by the material and process. If the material is not good, the heat treatment is not good or other processes are not done, it is easy to deformation, rust and cracking, so we must choose a reliable manufacturer. Baoji Pengyuan non-ferrous metal can produce DIN125 standard Flat Washers in strict accordance with international certification standards, specifications from M1.6 to M52; Helical Spring Lock Washers are DIN127 standard in sizes from M2 to M52.

The company can not only produce standard washers, but also according to customer needs to customize beautiful, personalized washers. The following titanium alloy 9 hole flat washers are manufactured by Baoji Pengyuan Non-ferrous Metal Co., Ltd. according to customer's customized needs. After about a week of material preparation, CNC mechanical finishing, coloring, etc. and cleaning the process, plastic sealing with plastic film, carton packaging. Finally according to the customer delivery time as scheduled delivery.