This standard applies to compression and extension springs of class 1, category 3 with forces at maximum spring deformation (F3) from 1
GOST 13768-1986 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