Abstract: A pipe fastener for securing pipes along walls, ceilings or the like, having top and bottom members each having two generally broad, flat sides extending at approximately forty-five degree angles from a middle portion and a base portion, respectively. The four sides have a plurality of spaced, parallel slots with the slots in the top member being selectively engageable with the corresponding slots in the bottom member, thus forming an adjustable enclosure for receiving a pipe. A set screw is provided in the bottom member and disposed perpendicular to the pipe for securing the pipe within the fastener, thus providing both initial and final adjustability features. The pipe fasteners have been designed for use with common attachment devices, such as beam clamps or toggle bolts, and the fasteners can be connected in series for hanging or securing additional pipes along the same route.