The Fujikin FINELOK-PURE series are high-performance, high-quality tube fittings. They are produced by making full use of design know-how and manufacturing technology Fujikin has accumulated throughout the years as an experienced precision fitting manufacturer. The FINELOK-PURE series are flareless type precision tube fittings that effectively create connections without the need for thread cutting or tube flaring. The fundamental design consists of four stainless steel components: body, from ferrule, back ferrule, and nut.