Special Purpose Washers

​A contact washer, also known as a conical lock washer, is a type of fastening component designed to prevent loosening of bolts and nuts due to vibration and pressure. Its conical shape and ribbed surface provide a 360° locking force around the fastener, enhancing the stability of the connection. ​

• Material Options: Contact washers are typically made from high-carbon spring steel or stainless steel, offering durability and resistance to corrosion.​
  

Applications:

Contact washers are widely used in various industries, including automotive, machinery, and construction, to maintain the integrity of bolted connections subjected to vibrations and dynamic loads. ​

Available Sizes:

Contact washers come in a range of sizes to accommodate different bolt dimensions. For instance, sizes can range from M3 with specific inner and outer diameters and thicknesses, up to M20, each tailored to fit corresponding bolt sizes.

Conical washers, also known as Belleville washers or disc springs, are specialized washers with a conical shape that function as springs. They are primarily used to apply a pre-load or tension between bolted components, ensuring a secure and stable connection. ​Grainger+2Wikipedia+2American Belleville+2

Applications:

• Vibration Absorption: When stacked, conical washers can effectively dampen vibrations and absorb shocks, making them suitable for machinery and automotive applications where movement-induced loosening is a concern. ​
  

Material and Standards:

Belleville washers are typically made from high-carbon steel or stainless steel to withstand significant loads and resist corrosion. They are manufactured according to various standards, such as DIN EN 16984 (formerly DIN 2093), which specifies manufacturing and quality requirements for disc springs.

A square ID washer, also known as a square inner diameter washer, is a type of washer designed with a square-shaped hole in the center, typically used in applications where a square-shaped fastener or component is being used. The primary function of a washer is to provide a larger bearing surface to distribute the load from the fastener and prevent damage to the material being fastened. Square ID washers are specifically made to fit square bolts or screws, making them a good choice for securing square-shaped fasteners or in applications requiring a more precise fit.

1. Shape: These washers have a square hole in the center, designed to fit square fasteners (like square-headed bolts, screws, or pins). The outer shape is often a square or rectangular form, although the specific dimensions can vary based on the application.

2. Material: Square ID washers are made from materials that suit the environment and load requirements. Common materials include:

   • Steel (plain, galvanized, or coated for corrosion resistance)

   • Stainless Steel

   • Brass

   • Aluminum

   • Plastic (for lighter-duty applications)

3. Load Distribution: Like other washers, square ID washers are used to distribute the pressure of the fastener over a larger surface area, helping prevent damage to softer materials and ensuring a secure connection.

4. Precise Fit for Square Fasteners: The square hole in the washer allows it to fit snugly around a square-headed fastener, preventing rotation or slipping. This feature is particularly useful in applications where a square fastener is preferred for added torque or where a non-rotating connection is required.

1. Mechanical and Structural Applications:

   • Used to secure square-headed bolts, square pins, or square screws in industrial, mechanical, or structural applications where high torque or a secure, non-rotating fit is necessary.

2. Electrical Equipment:

   • In some electrical enclosures or panel installations, square ID washers can be used with square bolts to secure electrical components or panels.

3. Furniture and Woodworking:

   • Square washers are useful in furniture manufacturing where square bolts or screws are used for securing heavy parts together, especially in wood or composite materials that need to be protected from damage by the fasteners.

4. Automotive and Machinery:

   • Square washers can be used in automotive and machinery applications where square-headed fasteners are needed for high torque or tight, secure fittings.

5. Construction:

   • Used in construction applications for securing square fasteners to structural elements such as beams, brackets, or plates.