Washers are small components commonly used in mechanical connections. They are generally flat metal rings. Their main function is to buffer, isolate, and seal between two fasteners to ensure the stability and reliability of the fasteners.

In daily life, the types of washers we often see include flat washers, spring washers, locking washers, stop washers, etc. Each type of washer can be further subdivided according to its shape.

The editor has sorted out the following 14 types of gaskets. Come and try them out to see if there are any you don’t recognize!

What kind of washer is this?

——Standard spring washer

Standard spring washer is the most commonly used type of washer in the market. Spring washers are often called spring washers in the bolt industry. Spring washers are widely used in load-bearing and non-load-bearing structures of general mechanical products. They are characterized by low cost and easy installation, and are suitable for parts that are frequently assembled and disassembled.

The materials are stainless steel and carbon steel. The commonly used spring washers are M3, M4, M5, M6, M8, M10. M12, M14, M16. The national standard GB/T 94.1-87 for spring washers specifies the technical conditions for standard spring washers with specifications of 2-48mm.

What kind of washer is this?

——Saddle spring washer

Saddle spring washer is a washer similar to a horseshoe, mainly used to prevent bolts from loosening. Its working principle is to use the special structure of the saddle shape to increase friction and prevent fasteners from falling off.

Saddle spring washers, like other wave spring washers and stainless steel spring washers, have good anti-loosening function.

What kind of gasket is this?

—— Wave spring gasket?

Wave spring gasket is a common mechanical seal component, generally made of metal material and wavy in shape.

Because it has good elasticity and sealing performance, and utilizes its elastic deformation characteristics, it can return to its original shape and maintain close contact when subjected to force, thereby achieving a sealing effect. It is suitable for various static sealing and dynamic sealing occasions.

What kind of washer is this?

Flat washers, also known as ordinary washers, are the most commonly used type of washers. They are mostly round in shape, and there are other shapes such as square washers according to assembly needs. Flat washers can basically be used in general bolt or screw connections.

However, flat washers have the function of increasing the contact area, thereby improving the stress condition of the connected parts and protecting the surface condition of the connected parts.

Specific types include flat washers-C grade, large washers-A and C grades, extra large washers-C grade, small washers-A grade, flat washers-A grade, flat washers-chamfered-A grade, square washers, etc.

What kind of washer is this?

——Saddle-shaped elastic washer?

Saddle-shaped elastic washers, also known as saddle-shaped washers. Usually used in general anti-loosening requirements, used with bolts to prevent loosening. After the nut is tightened, it gives the nut a force to increase the friction between the nut and the bolt!

The specification range of saddle-shaped elastic washers is: 2.5MM-12MM; heat treatment requires quenching and tempering, HRC 40~50 (process reference value); the material is mainly 65Mn spring steel, and the surface is oxidized and blackened.

What kind of gasket is this?

——Wave elastic gasket?

Wave elastic gasket, also known as wave gasket, two-wave gasket. Wave elastic gasket relies on its elastic deformation to press the connected parts to prevent loosening. The wave elastic force is small, the force is even, and the surface of the connected parts is not damaged. It is usually used in general anti-loosening requirements and is used with bolts to prevent loosening.

Specification range of corrugated elastic washers: 3MM-30MM; number of waves: 2; heat treatment requires quenching and tempering, HRC 40~50 (process reference value); the material is mainly 65Mn spring steel.

What kind of washer is this?

—— Internal tooth lock washer?

Internal tooth lock washer is a common fastener widely used in mechanical equipment. Its working principle is to fasten and fix the parts through the internal gear structure. According to the working principle, it can be simply divided into two steps: locking and unlocking.

Under normal working conditions, the internal tooth lock washer will remain tightened to prevent loosening and thread slippage, ensuring the normal operation of mechanical equipment.

What kind of washer is this?

—— External tooth lock washer?

External tooth lock washer is a washer commonly used for connecting mechanical parts. Its working principle is the same as that of internal tooth lock washer. It relies on the meshing force between the tooth tip and the plane of the connected part and the small elasticity to prevent the threaded connection from loosening.

External tooth lock washers are usually made of high-strength materials, such as stainless steel, aluminum alloy or copper alloy, etc., and have good mechanical properties and corrosion resistance.

What kind of washer is this?

——Internal serrated locking washer?

Internal serrated locking washer, as the name implies, has serrations inside the washer. It is a washer commonly used to connect fasteners and other parts. Its special design enables it to provide higher locking force when the connection is subjected to vibration or external force.

Internally serrated lock washers are usually made of metal or elastic material with multiple internal serrations. These internal serrations are designed to increase the friction between the washer and the fastener, providing additional resistance to prevent the fastener from loosening.

What kind of washer is this?

——External serrated locking washer?

External serrated locking washers are used as springs on small parts. Their size is similar to the size of the fastening screws and self-tapping screws used with three-dimensional sheet metal stamping parts. Serrated washers are mainly used to prevent bolts from loosening.

Mainly used for locking parts under bolt heads or nuts. This product complies with the implementation standard of GB/T862.2 and is a separate annular washer with its opening in a dislocated state.

What kind of washer is this?

——Square bevel washer for I-beam?

Square bevel washer for I-beam is a mechanical component used for I-beam connection, usually consisting of a set of square bevel washers and nuts.

I-beam is a common building material, widely used in various building structures. In order to ensure the safety and stability of I-beam, square bevel washers are introduced as an important connector. The guidance of square bevel washers standards is of great significance to ensure the quality and reliability of I-beam structures.

What kind of gasket is this?

——Single-ear stop gasket?

Single-ear stop gasket is a common mechanical sealing device, whose main function is to prevent liquid or gas leakage and provide axial and radial fixed support.

The single-ear retaining washer consists of an inner ring, an outer ring and an ear piece on one side. The shaft is clamped between the inner ring and the outer ring, and the ear piece rests on the outer ring. During operation, a certain radial gap is formed between the inner ring and the outer ring, allowing lubricating oil or sealing medium to enter therein, playing a role of lubrication and sealing.

What kind of washer is this?

——Double-ear stop washer?

Double-ear stop washer, also known as double-ear retaining ring, is a metal ring-shaped part, often made of spring steel or stainless steel. According to its structural characteristics, double-ear stop washers can be divided into two types: inner ear stop washers and outer ear stop washers.

As a component commonly used in mechanical equipment, its main function is to prevent axial displacement of the bearing during operation.

What kind of washer is this?

——Stop washer for round nut?

Stop washer for round nut is also called backstop washer, commonly known as cuckold washer, which is a washer that uses the cooperation of stop ear, round nut opening and shaft keyway to prevent round nut from loosening.

Usually used together with round nuts, it is widely used in electrical appliances, elevators, mechanical accessories and other fields to fix rolling bearings to prevent loosening.

The above are the types of washers commonly used in the market. Each washer has its specific performance advantages and applicable application scenarios. Therefore, when choosing a washer, it is necessary to confirm the more suitable type of washer based on specific needs, usage scenarios and performance requirements.

As a robot, what other common washers are there in daily life? Welcome to discuss and leave a message in the comment area~