Abstract: A full or half clamp for supporting a pipe from a mounting surface includes a plastic body portion having an arcuate recess with an arcuate length in excess of 180.degree. and opposite ends that are relatively thin and flexible to facilitate snap fitting of a pipe into the recess. A pivotable arm is integrally connected to the body portion of the full clamp by a hinge formed by a notch in an outer wall of the body portion. The arm includes an arcuate recess forming a continuation of the recess in the body portion when the arm is moved into engagement with the body portion. A plurality of circumferentially spaced, longitudinally extending plastic projections are provided on the inner wall of the recesses in both the body portion and arm for gripping the exterior surface of the pipe. One of the projections is located on the arm immediately adjacent the hinge to provide a well defined hinge line for the arm.