DIN EN ISO 6149-4 (2015-03)废止
Connections for fluid power and general use - Ports and stud ends with ISO 261 metric threads and O-ring sealing Part 4: Dimensions, design, test methods and requirements for external hex and internal hex port plugs (ISO 6149-4:2006)
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
