Manufactured to an ASME Quality Certificate SPC is a feature of the QA process. High quality silver plated threads on nuts to ensure no galling on the body threads. New Eagle Industrial Corporation Suparcase Ferrule for corrosion resistance. Gaugeable Bodies. Tube fittings supply with DIN, ISO, EN, SAE, MA certificate Zero leakage even under tough working conditions Good high-pressurecorrsionextreme temperature resistance Simple to operate and save time and cost because of the usage of elastic seal Widely used throughout the world It can be reused.