The most common fasteners – square washer

Square washers are usually thin pieces of various shapes used to reduce friction, prevent leakage, isolate, and prevent loosening or dispersing pressure. This component is found in many materials and structures and is used to perform a variety of similar effects. Limited by the material and process of the threaded fastener, the support surface of the bolt and other fasteners is not large, so in order to reduce the compressive stress of the pressure surface to protect the surface of the connection, a gasket is used.

Below is a directory

• Definition of a square washer

• The role of the square washer

Definition of a square washer

Square washer is mainly used to reduce the pressure, when some parts of the tightening axial force is very large, it is easy to make the gasket into a dish shape, then you can change to the material and improve the hardness to solve.

The locking effect of the spring washer is general, and the important parts are used as little or not as possible, and the self-locking structure is adopted. For spring washers for high-speed tightening (pneumatic or electric), it is best to use a gasket with surface phosphating treatment to improve its wear reduction performance, otherwise it is easy to burn out or open the mouth due to friction and heating, and even damage the surface of the connected part. For thin plate connections, a spring washer structure should not be used. According to statistics, spring washers are used less and less in cars.

The connecting tooth shape in the toothed elastic gasket is more used in the automotive industry due to the large and uniform locking force, while the spacer tooth type is less.

Square washer are usually thin pieces of various shapes used to reduce friction, prevent leakage, isolate, and prevent loosening or dispersing pressure. This component is found in many materials and structures and is used to perform a variety of similar effects. Limited by the material and process of the threaded fastener, the support surface of the bolt and other fasteners is not large, so in order to reduce the compressive stress of the pressure surface to protect the surface of the connection, a gasket is used. To prevent loosening of the coupling pair, anti-loosening spring washers and multi-toothed locking washers, round nut stop washers and saddle, wave and tapered elastic washers are used.

The role of the square washer

1. Expand the contact surface, reduce the stress concentration of the tightening force on the fasteners, and prevent damage to the fasteners.

2. When tightening the nut, it will not scratch the fastener.

3. Flower pads and spring pads also have the effect of preventing nut loosening.

Because the above performance of the square washer can effectively prevent the leakage and water leakage of the building structure, play a shock absorption and buffering effect, and also have a good tightening and sealing effect, so its application in life is still quite extensive, and the square gasket is now mostly used on construction sites.

Ningbo Yiyihong Fastener Co., Ltd. was established in 2001, specializing in the production of various high-strength bolts, nuts and screws, with an annual production capacity of 30,000 tons and an annual turnover of 300 million yuan. Products include ANSI/ASTM, DIN, BS, ISO, GB, JS and other standards, mainly used in the field of high-strength seals and oil pipeline valves.