Lock Washer

A lock washer, also known as a locking washer or spring washer, is a type of mechanical fastener used to prevent loosening of threaded connections. Here is a detailed introduction:

Structure and Appearance

A lock washer is typically a thin, circular metal disk with a split or a series of tabs around its circumference. The split or tabs are designed to deform slightly when the washer is installed, creating a spring - like action.

Working Principle

The main function of a lock washer is to provide a constant force that resists the rotation of the nut or bolt. When the threaded connection is tightened, the lock washer is compressed between the nut or bolt head and the surface of the object being fastened. As the nut or bolt tries to loosen due to vibration, shock, or other external forces, the deformed lock washer exerts a counter - force that helps to keep the connection tight.

Types

External Tooth Lock Washers: These have teeth on the outer diameter that dig into the mating surfaces to prevent rotation. They are often used in applications where a high - level of locking force is required.

Internal Tooth Lock Washers: The teeth are on the inner diameter of the washer. They are suitable for use with nuts and bolts where the outer surface of the bolt needs to remain smooth.

Wave Lock Washers: Have a wavy or undulating shape, providing a spring - like action to maintain tension in the connection. They are commonly used in applications where space is limited or where a more flexible locking mechanism is needed.

Applications

Lock washers are widely used in various industries and applications, including automotive, machinery, construction, and electronics. They are used to secure engine components, fasten machinery parts, assemble building structures, and hold electronic components in place. In any situation where threaded connections need to be kept secure and prevent loosening, lock washers play a crucial role.

In summary, lock washers are an important type of fastener that helps to ensure the reliability and safety of threaded connections by preventing them from loosening under various operating conditions.

Lock Washer

External Tooth Lock Washers

M5-M20 Internal Tooth Lock Washer

M3-M20 Black Oxide Internal Slotted Lock washer

DIN137b Curved Washer Wave Spring Washer

High Tensile Steel Curved Washer

DIN 9250 Safety Lock Washer

DIN 25201 Wedge Lock Washer

DIN 6795 Grounding Washers

DIN 9250 S/Vs Safety Lock Washer

Carbon Steel Galvanized and Stainless Steel

Size M6 up to M20

Standards (DIN/EN ISO/ANSI/ASME B18.21.1)

Or customized specifications

More options DIN6797 DIN6798 external, internal

Tooth lock washers, material by Carbon Steel, SS304

SS316 stainless steel

M5 to M20 Internal Tooth Lock Washer

M5 to M20 Internal Tooth Lock Washer are widely used in various industries. In the automotive industry, they are used to secure engine components, suspension parts, and other critical fasteners that are subject to vibration and movement. In the aerospace industry, where reliability and safety are of utmost importance, these washers are employed to fasten aircraft structural components and mechanical systems. They are also commonly used in machinery manufacturing, industrial equipment, and electrical installations to ensure the stability and safety of connections.

DIN 25201 Wedge Lock Washer

When the nut is tightened onto the bolt, the DIN 25201 wedge lock washer is compressed between the nut and the connected part. The wedge - shaped surface creates a frictional force that resists the loosening of the nut due to vibration, shock, or other external forces. As the nut tries to rotate in the loosening direction, the wedge of the washer digs into the surface of the nut or the connected part, preventing the nut from turning.