Abstract: A quick-release clamp that is placed over a pair of waveguide flanges and then locked into place. The device eliminates the need for laborious removal and reinstallation of numerous small nuts and bolts from the waveguide flanges, which are a time consuming component of every maintenance job done on the waveguides. The device consists of a formed clamp that conforms the to the shape and size of a particular waveguide flange pair. The clamp is hinged in one corner and has a securing mechanism in the opposite corner. The inside of the clamp has gaskets than ensure a tight secure fit for the clamp. In this way, a variety of waveguide flanges can be opened and sealed quickly and easily.