Angiographic syringe and luer connector

A syringe assembly for injecting fluids into the body of an animal through tubing, the assembly comprising:

• a syringe having a tubular body portion, a discharge end portion and a piston disposed for sliding movement within said tubular body portion, said discharge end portion having a narrow tubular extension defining a tip of the discharge end portion, a series of external threads spaced proximally from the tubular extension and a circumferential area free of threads spaced proximally of said external threads;
• and,
• a tubular connector member having internal threads at a first end and tubing connecting structure at a second end, wherein said internal threads are engageable with the external threads of the syringe discharge end and are configured to be received about said circumferential area when the internal threads are rotated past the external threads of said syringe for allowing free rotation of said tubular connector with respect to the syringe discharge end.