This spring washer is molded in acetal material that has excellent spring properties and is light weight. The material is electrical and thermal insulating and corrosion resistant. The acetal (POM)lubricity allows its use in rotating assemblies as well as under water applications. Spring washers are used to eliminate rattles, they take up tolerance variables and they provide accurate spacing and tension. The parts may be used singly in parallel, in series or in series parallel for a wide range of deflection and load capacity.