Mast clamps made of galvanized steel for securely attaching a satellite mount, for example, to a balcony railing. In combination with a separately available bracket, such as 67300, 67301, 67302, the clamps can be used to attach a satellite dish to railings and masts outdoors. Includes 2 U-bolts with M8 thread, 8 mm, and a hole spacing of 70 mm, as well as 2 clamp rings with a material thickness of approximately 2 mm. Also included are 4 flange lock nuts with M8, 8 mm. The pipe clamps accommodate masts and pipes with a diameter of 30-60 mm.