
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
出版:International Organization for Standardization

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NEN ISO 9974-4:2006 - Identical
BS ISO 9974-4:2006 - Identical
SS ISO 9974-4 Ed. 1 (2006) - Identical