A mounting bracket for securing a camera or other device to a hollow pole includes an L-shaped member, attached to the device, with a vertical surface that engages the outer surface of the pole and a horizontal surface that rests on the top surface of the pole while a downwardly-projecting member slides into the top of the pole allowing the device to hang stably on the pole during alignment. A bolt passes axially through the downwardly projecting member and engages a gripping member. The downwardly-projecting member and gripping member have mating surfaces inclined relative to the axis of the bolt, so that when the bolt is tightened, the gripping member slides laterally to engage against the inner surface of the pole. A cover plate engages the outer surface of the opposite side of the pole and is secured to the L-shaped to fully secure the assembly.