The DIN 433 standard is officially recognized as obsolete and has been replaced by DIN EN ISO 7092:2000-11, which is the current regulation for this type of fastener.
Technical specification and application of DIN 433 washers
Stainless steel washers conforming to the geometric parameters of DIN 433 are highly specialized fasteners with a reduced outer diameter. In the engineering practice of EV Group China, these washers are used to assemble critical threaded connections where minimizing the assembly dimensions while maintaining high load-bearing capacity is required.
The use of A2 grade steel (AISI 304) provides the products with resistance to corrosion in atmospheric conditions and mildly aggressive environments. The main areas of integration include:
- Food machinery manufacturing: preventing oxidation upon contact with organic acids.
- Instrument engineering: precision mounting in confined spaces.
- Chemical industry: ensuring the durability of detachable joints.
The washer is installed in the contact area between the bolt or screw head and the part’s bearing surface, ensuring even pressure distribution and preventing material deformation during tightening.