Applicable tubing material Applicable tubing O.D. (mm) o2 o3.2 o4 o6 o8 o10 o12 o16 Unions 19 M5 M6 1 8 1 4 3 8 1 2 FEP PFA Nylon Soft nylon Polyurethane M3 Fittings Unions Unions 52 10-32 UNF 1 8 1 16 Applicable tubing O.D. (inch) o1 8 " o5 3 2 " o3 1 6 " o 1 4 " o 5 1 6 " o3 8 " o1 2 " 76 M5 1 8 1 4 3 8 1 2 1 4 3 8 1 2 FEP PFA Nylon Soft nylon Polyurethane FEP PFA Nylon Soft nylon Polyurethane Applicable tubing O.D. (inch) 1 4 3 8 1 8 o1 8 " o5 3 2 " o3 1 6 " o1 4 " o5 1 6 " o3 8 " o1 2 " 1 2 88 Applicable tubing O.D. (mm) o2 o3.2 o4 o6 o8 o10 o12 o16 1 8 1 4 3 8 1 2 82 FEP PFA Nylon Soft nylon Polyurethane FEP PFA Nylon Soft nylon Polyurethane Option General Purpose Fittings Series One-touch Fittings Series KQ2 Applicable tubing.Metric size One-touch connection and release Possible to use in vacuum to .100 kPa One-touch Fittings Series KQ2 Applicable area.U.S.A., etc. Inch-size tube/UNF, NPT thread connection One-touch Fittings Series KQ2 Applicable area.Australia, Japan, etc. Inch-size tube/M5, R, Rc thread connection With seal Electroless nickel plated Page Uni One-touch Fittings Series KQ2 Applicable tubing.Metric size Male thread for piping that drastically reduces the screw-in time Uni One-touch Fittings Series KQ2 Applicable tubing.Inch size Male thread for piping that drastically reduces the screw-in time Fittings & Tubing Series Variations 2