This part specifies the markings, dimensions and parameters of small cylindrical helical compression springs. This part applies to general-purpose cold-rolled cylindrical helical compression springs made of circular cross-section materials with a diameter of less than 0.5mm (both ends of the coils are tightly ground and non-grinded and grounded and ground), hereinafter referred to as springs.
GB/T 1973.3-2005 Referenced Document
GB/T 1358 Cylindrical helical spring seriate sizes*, 2009-03-16 Update