NSC compression tubefittings undergo special processes like burnishing, cold hardening, thread rolling and case hardening of back ferrule for better swaging. Nut threads are silver plated for anticizing of threads. Easy identifications are provided for tube fittings, such as step shoulder on Hex body and nuts for metric size fittings. For high pressure as well as vacuum and other critical applications, the plant designers have no other alternative but to use a most reliable, safe and leak proof Tube connection. NSC proven design of its products in the fields of Hydraulics, Pneumatics and Instrumentation assures you of maximum reliability and years of trouble-free service under adverse conditions and rigorous operating environment.