Washer DIN 9021, stainless steel A2, A4

DIN 9021 stainless washer

The DIN 9021 stainless washer is a flat ring, the outer diameter of which is three times larger than the inner one, therefore such washers are often called enlarged.The main purpose of washers of this type is to increase the load area in the joint, which prevents deformation and wear, especially when installing material with low load-bearing characteristics: thin sheet steel, wood, etc. Such materials were used to cover the bodies of vans and the sides of cars and non-self-propelled platforms, which led to another name for washers used in cladding, bodywork. DIN 9021 stainless steel washer is widely used in machine-building industries, construction, chemical, food industry, car service due to the properties of the manufacturing material: strength, ductility, corrosion resistance and hygienic cleanliness.

ALFA-STAR supplies DIN 9021 washers in a wide range of sizes in A2 and A4 versions. Stainless steel A2 (AISI 304) is called food grade, because it has, in addition to excellent strength and anti-corrosion characteristics, high environmental friendliness. Due to this, A2 products are used in the equipment of chemical, food, pharmaceutical enterprises. A4 steel (AISI 316)It belongs to the class of acid-resistant. Products in this version are operated in environments with increased aggressiveness (solutions of acids and alkalis, chlorine-containing gases and solutions, sea water), as well as in conditions that exclude the manifestation of magnetization and creep of the material.A4 washers are used in shipbuilding and aircraft construction, in the construction of structures in aggressive environments, in chemical industries, car service, etc. DIN 9021 washers, as well as other types of fasteners supplied by our company, have high strength, reliability and long service life.