The International Standard specifies the characteristics of plain steel washers, small, normal and large series, of product grade A for metric screw and washer assemblies in accordance with ISO 10644. NOTE 1 The product can be manufactured under the conditions defined in Clause 5. NOTE 2 The manufacturing of screw and washer assemblies takes into consideration material and production procedure of screw and plain washer as well as the assembly process of components, in order to meet specification requirements.