This standard applies to compression springs of class 1, category 4 with forces at maximum spring deformation (F3) from 2800 to 180000 N
GOST 13769-1986 Referenced Document
GOST 13764-1986 Cylindrical helical compression (tension) springs made of round steel. Classification
GOST 13765-1986 Cylindrical helical compression (tension) springs made of round steel. Designation of parameters, methods for determination of dimensions