This International Standard specifies terms and definitions commonly used in the metal springsindustry. Specifically, these terms appear in technical product documentation. Heat-treatment and surface-treatment terms pertinent to springs are included.Terms are grouped into the following seven categories:a) general features of springs;b) application of springs in machinery and engineering;c) layout and nomenclature of springs;d) specification requirements;e) design and calculation;f) manufacturing and processing;g) testing and inspection.The hierarchical structure of terminology in each category is given in Annex B.