Abstract: An attachment is described whereby a cannula or needle can be connected to a syringe or vacuum-creating machine in a quick and reliable manner. The cannula attachment comprises a plug which rigidly connects to the cannula at a tip using welding or other mounting methods, such that the plug can communicate fluid into and out of the cannula. The plug includes external threads about a middle portion, and a frustro-conical nose is formed at the opposite end. The nose is sized to fit snugly into the port of the syringe or vacuum-creating device at some intermediate distance between the tip and the end of the nose. With the nose tightly in the syringe port, a channel is formed through the plug from the cannula to the syringe barrel. The attachment is held in place by a locking sleeve which receives the syringe's port and the plug within opposite ends of a longitudinal bore such that the nose projects loosely into the syringe port.