Important note: The DIN 1440 standard has been officially withdrawn and replaced by the current international standard DIN EN 28738:1992-10, which regulates the technical parameters of this type of fasteners.
Technical purpose and area of application
Reinforced flat washers, designed for use in assemblies with pins and studs secured by cotter pins, provide uniform distribution of axial load and protection of mating surfaces from mechanical wear. The products comply with precision class A, which ensures minimal tolerances and high reliability of the connection in critical engineering structures. The range includes sizes with an inner diameter from 5 to 100 mm.
Available materials and finishes:
- Carbon structural steels.
- Steels with protective anti-corrosion coating: electro-galvanized, nickel-plated.
- Corrosion-resistant austenitic steels (grades A1–A5).
- Brass alloys for specific operating conditions.
Technical reference: The equivalent of this standard in the international system is ISO 8738. EV Group China specialists recommend using the current regulatory framework DIN EN 28738 when designing new assemblies and mechanisms.