This part manufactured by Swagelok can quickly and safely disconnect from 1/4 inch tubing. When the front section of the outer shell (right end in the picture to the left) is actuated towards the back section, the mechanism releases and seals the propellant fill or vent plumbing line. These QD systems allow for the rocket to be filled and vented simultaneously right up until launch to ensure the propellant tanks are completely full of liquid oxygen and methane.

Provides a mounting surface to the cylindrical rocket body so that when pneumatic piston are pressurized to actuate the QDs, the force is distributed across a large surface area of the rocket body to avoid deformation. This part will most likely have to be milled with the 5 axis mill because of the relatively complex geometry.