GOST 21401-1975 Plain limit gauges for dimensions up to 500 mm. Required dimensions*, 1975-04-19 Update
GOST 9.073-1977 Unified system of protection against corrosion and aging. Metallic and non-metallic inorganic coatings. Types, thickness rows and designations
GOST 9.306-1985 Unified system of corrosion and ageing protection. Metallic and non-metallic inorganic coatings. Symbols*, 1985-04-19 Update
GOST 14826-1969 history
1969GOST 14826-1969 Sheet plain single-end plug gauges with diameter over 50 to 250 mm. Design and dimensions