ISO 16249:2013 (R2018)

ISO 16249:2013 specifies specifies general principles for the creation of symbols of physical quantities, coefficients, and parameters for metal springs. It specifies the presentation of basic characters, subscripts, and application symbols for use in the field of helical compression springs, helical extension springs, helical torsion springs, flat springs, and leaf springs with attention to technical product documentation, especially for describing and ordering.