This part specifies the markings, dimensions and parameters of small cylindrical helical extension springs. This part applies to general-purpose cold-rolled cylindrical helical tension springs (circular shackle pressure center type) made of circular cross-section materials with a diameter of less than 0.5 mm, hereinafter referred to as springs.
GB/T 1973.2-2005 Referenced Document
GB/T 1358 Cylindrical helical spring seriate sizes*, 2009-03-16 Update