This standard specifies the design and dimensions of bolts for machined slots.
GOST 13152-1967 Referenced Document
GOST 9.073-1977 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. Types, thickness rows and designations
GOST 13152-1967 history
1967GOST 13152-1967 Bolts for machine slots. Design and dimensions