The washers defined in the DIN 6903 standard published by the German Standardization Institute (DIN) are designed to be used with the lead screw and washer assemblies defined in the DIN 6901 standard. This standard describes the requirements for flat washers for screw and washer assemblies of two types, Type A and Type B.
Similarly, the ISO 10669 standard published by the International Standards Organization (ISO) describes the properties of flat steel washers with product class A for lead screw and washer assemblies defined in the ISO 10510 standard (ISO 10669 Flat washers for screw and washer assemblies - Normal and large series - Product class A).
According to the ISO 10669 standard, the mechanical properties of these washers must comply with the requirements described in the DIN 1624 standard (DIN 1624 Flat steel products - Cold-reduced mild non-alloy steel strip with a width not exceeding 650 mm - Technical delivery conditions). The geometric tolerances of these washers must comply with the requirements described in the DIN 522 standard (DIN 522 Metal washers).
In terms of the finishing surface, the DIN 267-9 standard applies to electroplating, and the DIN 522 (product class A) standard applies to the surface smoothness. In addition, in terms of acceptance inspection, the DIN 522 standard is valid for acceptance inspection.
Flat washers for tapping screw and washer assemblies, for example Type A, are generally manufactured with a nominal size of 4.7 and a minimum hardness of 180 HV 101. In terms of product specifications, the table format in the DIN 4000-3-1 standard also applies to these washers.
Our organization, among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, with its trained and expert staff and advanced technological equipment, within the scope of DIN 6903 standard, for flat washers for tapping screw and washer assemblies and within the scope of ISO 10669 standard, It also provides testing services for flat washers (normal and large series, product class A) for screw and washer assemblies.
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