Abstract: A releasable device for securely fastening intravenous tubing to an intracatheter insert or needle and method are disclosed. The securing system comprises a locking member attached to the hub of the intracatheter insert and a projection knob molded near the end of the intravenous tubing, as part of the tubing. The locking member comprises a loop portion which is designed to securely but releasably fit over and around the projection knob when the intravenous tubing is inserted into position in the intracatheter insert. The locking member is also comprised of a pair of inclined arms attached to the loop portion and to which is attached a pair of parallel legs further including a pair of radially inwardly directed hinge pins, which hinge pins are hingedly attached to the hub of the intracatheter insert or needle. The locking member of the present invention is preferably constructed of a single length of metal rod which is bent into the desired shape.