Drug delivery connectors

A device comprising:

• a syringe barrel having a distal end, an open proximal end, a sidewall extending between the distal end to the open proximal end, the sidewall defining a chamber, the distal end including a distal wall,
• a male connector integrally formed on the distal wall, the male connector having an open elongate tip having an outside surface and an inside surface that defines a passageway to the chamber, the open elongate tip extending in a distal direction from the distal wall and providing access to the chamber, the outside surface of the elongate tip having a taper less than 6% extending in a distal direction;
• and
• a collar disposed coaxially around the elongate tip of the male connector, the collar forming a channel between the elongate tip and the collar for receiving a portion of a compatible female connector having an inside surface having a taper decreasing in a proximal to distal direction in the range of less than 6%, the collar including a plurality of longitudinal ribs disposed on an inside surface of the collar and extending inwardly into the channel formed between the collar and the elongate tip to provide an inner cross-sectional diameter of the collar that is greater than 0.168 inches and an outer cross-sectional dimension of the collar is less than 0.395 inches to prevent entry of a non-compatible female connector into the channel and connection to the open elongate tip.