SMC KJH07-34S fitting, male connector, KJ MINI ONE TOUCH sold in packages of 10; price is per piece
One-Touch mini fittings series KJ is available for use with miniature valves and actuators, M3 and M5 ported. Their compact one-touch collet design allows easy disassembly with strong tube gripping. Electroless nickel plating is standard.
Allied Electronics:
FITTING, MINI, MALE, DIFF DIA STRAIGHT, FOR 1/4 TUBE, 1/8 PORT