... Couplings Straight Tube 8x1 MM Thread NPT 1/4'' For European Trucks2 Application : Commercial Vehicles, Such as Mercedes Benz, Man, Scania ... :2009 and ISO 14001:20044 Couplings have been designed to conform to the Standards as below ISO7628 ,DIN74324, DIN73378, SAEJ844, NFR12-632, MVSS ...