DIN EN ISO 6149-4 : 2017 Title: 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 6149-4:2017) Year: 2017 Publisher: DIN Media GmbH Availability: Within 1-2 working days