This part of GB/T 1239 specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage requirements, etc. of cold-rolled circular-section cylindrical helical compression springs. This section applies to cold-rolled cylindrical helical compression springs of circular cross-section, the cross-sectional diameter of the spring material is greater than or equal to 0.5mm. This section does not apply to springs with special requirements.