Tec- Mec Mild Steel Machine Washer 20-30mm

A machine washer is a type of washer used in mechanical and industrial applications to distribute the load of a fastener (such as a bolt or nut), reduce friction, and prevent damage to the surface being fastened. They are commonly used in machinery, automotive, and construction industries to ensure a secure, stable, and efficient connection between components.

1. Flat Washers:

   • Most common type of machine washer. They have a flat, round shape and are used to distribute the load of a fastener over a larger surface area. This prevents damage to softer surfaces and increases the stability of the connection.

   • Available in a variety of sizes, they can be used for general-purpose applications.

2. Spring Washers:

   • Also known as lock washers, these washers have a spring-like shape and provide a tightening effect to prevent nuts and bolts from loosening due to vibration. Common types include split washers and wave washers.

   • Used in environments where vibration or movement could cause a fastener to become loose.

3. Lock Washers:

   • These washers are designed to prevent bolts from loosening under heavy vibrations. They can be internal or external and often feature teeth or grooves that dig into the surface of the material or fastener to create resistance.

   • Lock washers are commonly used in machinery and automotive applications.

4. Fender Washers:

   • Larger in diameter than flat washers, fender washers are used when a larger surface area is needed to prevent damage to thin or soft materials.

   • Commonly used in applications where extra load distribution is necessary.

5. Belleville Washers:

   • A type of spring washer that is conical in shape. Belleville washers are used to apply a preload to fasteners, making them ideal for applications where a specific amount of force or tension is required.

   • They are often used in high-tension applications such as in compressors or pumps.

6. Washer with Rubber Insert:

   • These washers have a rubber insert that provides additional vibration damping and shock absorption. They are often used when the washer needs to act as a seal to prevent leakage or contamination.

   • Commonly used in automotive, plumbing, and sealing applications.

7. Countersunk Washers:

   • These washers are designed to fit into countersunk holes, ensuring a flush fit between the washer and the surface. They are often used in aerospace and furniture applications where aesthetics and functionality are both important.

• Steel: The most common material, offering a good balance of strength and durability. Can be treated to resist rust and corrosion.

• Stainless Steel: Resistant to corrosion, making it ideal for outdoor or marine environments, as well as in applications where the washer will be exposed to moisture.

• Brass: Corrosion-resistant, brass washers are used in electrical and plumbing applications.

• Aluminum: Lightweight and corrosion-resistant, aluminum washers are used in applications where weight is a concern.

• Plastic: Lightweight and non-conductive, these washers are often used in electrical applications or where corrosion is an issue.