BS EN ISO 9974-2:2000
普通和液压传动用联接件.用ISO 261弹性螺纹或金属与金属间密封的气门和双头螺栓端头.(E型)弹性密封的双头螺栓端头
Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Stud ends with elastomeric sealing (type E)