Connections for general use and fluid power - Ports and studs ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 1: Threaded ports (ISO 9974-1:1996); English version of DIN EN ISO 9974-1
通用和流体动力连接件.带ISO 261弹性体或金属对金属密封螺纹的端口和螺柱端头.第1部分:螺纹端口(ISO 9974-1-1996);德文版EN ISO 9974-1:2000