a conveyor guide rail support device comprising an elongated stainless steel sleeve and a structural plastic member integrally molded in the sleeve having at least one end extending outward of the sleeve to form one side of a compression clamp . a mating side of the compression clamp is separately molded and releasably coupled to the integrally formed side using a threaded fastener which engages a nut integrally molded within one side of the clamp . each side of the compression clamp is also formed with an alignment apparatus which allows the two sides of the compression clamp to be aligned when brought together into compression using the threaded fastener .