Standard name: ISO 5783:2019 Hydraulic fluid power — Code for identification of valve mounting surfaces and cartridge valve cavities
Website link: https://bbs.biaozhuns.com/thread-310116-1-1.html
Standard name: ISO 10763:2020 Hydraulic fluid power — Plain-end, seamless and welded precision steel tubes — Dimensions and nominal working pressures
Website link: https://bbs.biaozhuns.com/thread-310222-1-1.html
Standard name: ISO 6149-4:2017 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
Website link: https://bbs.biaozhuns.com/thread-310229-1-1.html