Various safety regulations for health and safety in factories shall offer a comprehensive protection to workers, which e.g. work with air operating equipment. Therefore STEINCO has developed the self-venting coupling 12S.C. in order to meet these requirements. Not only its high security guarantee is outstanding, the coupling with its compact design is also setting a high standard in its use. Material for the manufacture of the 12S.C coupling is brass, nickel plated. The coupling is also available with a POM (Polyacetal)-disconnection sleeve.