Saddle spring washers (Saddle spring washers) to DIN 128A are lock washers used on bolts or screws. These washers are usually made of spring steel and can be given a surface treatment such as zinc plating or blackening to improve corrosion resistance and aesthetics. Materials can be selected from stainless steel (e.g. 304/316), carbon steel or alloy steel to suit different application environments and corrosion resistance needs.

Stainless Steel (304/316): Offers superior corrosion resistance and is suitable for moist or corrosive environments. The 316 grade has additional molybdenum, providing even better corrosion resistance, especially in marine applications.

Carbon Steel: Provides good strength and is the most common material for bolts. It may require additional surface treatments like galvanizing for increased corrosion resistance.

Alloy Steel: Offers enhanced strength and durability. It is often used in high-stress applications where high tensile strength is required.

Advantage:

High Strength: These washers are designed to handle significant pre-tensioning loads, making them suitable for use with high-strength bolts of grades 8.8 to 10.9 without any restrictions .

Corrosion Resistance: The oxidized blackening process provides a protective layer that resists corrosion, which is particularly important in environments exposed to moisture, chemicals, or extreme temperatures .

Load Distribution: The cushion design of these washers helps distribute the load from the fastener, reducing stress concentration and protecting the connected materials from damage.

Durable Finish: The blackened finish not only enhances the aesthetic appeal but also contributes to the wear resistance of the washer, prolonging the life of the fastener assembly .

Scope of Application

Automotive Industry: Used in the assembly of vehicles to secure components that require a reliable connection for safety and performance.

Aerospace: Employed in aircraft construction for high-strength connections that must withstand the rigors of flight.

Construction: Utilized in heavy machinery and structural support systems where strength and durability are essential.

Machinery: Used in various mechanical applications to ensure secure and stable fastening of components.