Abstract: A pipe hanger has a tubular section which is split axially so that the tubular section can be opened and fit around a pipe. Two partially overlapping tabs extend from the tubular section. When the tabs are urged together, holes in the tabs become aligned, and permit a single fastener to secure the tabs together, and to affix the hanger to a support structure. The hanger therefore requires only a single fastener. The fastener is preferably supplied with the hanger, and is held by friction in one of the holes in the tabs, or in a tubular chamber extending from one of the tabs. The shape of the tubular section facilitates manual closing of the tubular section around the pipe. The hanger is very easy to install, even when the hanger is located in an inconvenient position.