... seal gasket or glue. One touch fittings: KQ2H1. KQ2 Series one touch fittings (push in fittings), equivalent to SMC.2 ... 0, 1/8", 1/4", 3/8", 1/2"5. Thread with seal gasket or glue.Applicable tubingTube materialPolyurethane(PU ... .3M6×1.0KQ2H06-M610101914.913.5443.41/8KQ2H06-01S12-22.518.51713.110.4161/4KQ2H06-02S14-23171713.110.4143/ ... /2KQ2H16-04S2425.739.527.5251139647 Pneumatic Fittings (KQ2H Series)