BS EN ISO 9974-3:2000 普通和液壓用聯接結件.用ISO 261螺紋的彈性或金屬與金屬間密封的氣門和雙頭螺栓端頭.(B型)金屬與金屬間密封的雙頭螺栓端頭
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 metal-to-metal sealing (type B)