Quick connect coupling

A quick connect coupling comprising:

• a clip;
• a port comprising:
• an interior annular groove adapted to support said clip;
• a forward cylinder;
• a rear cylinder;
• a first transition ramp;
• a port peak distance;
• a first intermediate cylinder intermediate to said forward cylinder and a second intermediate cylinder, said second intermediate cylinder intermediate to said first intermediate cylinder and to said rear cylinder, said first transition ramp extending from said first intermediate cylinder to said second intermediate cylinder;
• and
• a second transition ramp extending from said forward cylinder to said first intermediate cylinder;
• a sealing element;
• and
• a stem having a male connection portion comprising:
• a forward annular seal groove adapted to receive said sealing element;
• an annular lead-in surface;
• a leading support cylindrical surface;
• a following support cylindrical surface;
• a camming ramp;
• a stem peak distance;
• a centering ramp;
• and
• an intermediate support cylindrical surface intermediate to said leading support cylindrical surface and said following support cylindrical surface.