SMC M-3AU-3 fitting, M MINI FITTING sold in packages of 10; price is per piece
M sub-miniature tube fittings are available for applications where space is more of a concern than flow rate. The tubing features a tight minimum bend radius of just 4 mm. The economical tubing is available in 20 m rolls of your choice of seven available standard colors. Four fitting types are available in two connect the tubing to a straight or angled M3 or M5 threaded port, and two connect the tubing to larger tubing or plug into a standard KQ2 Series one-touch fitting.
* Tube: Possible for Combination Use of Nylon Tube and Polyurethane Tube