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ISO 9974-4:2016

Действует
Connections for general use and fluid power -- Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing -- Part 4: Dimensions, design, test methods and requirements for external hex and internal hex port plugs — 18 стр.
ICS
23.100.40 Piping and couplings / Трубопроводы и соединения