Abstract: An assembly for attaching a coaxial cable junction block to a tubular grounding member includes a thin metal strap adjustably attached to the junction block to secure it to a grounding member, such as an electrical service conduit. The easily attachable assembly simultaneously provides for the interconnection between two coaxial cable sections, convenient mounting of the assembly eliminating the need to provide mounting holes in a building side wall or the like, and direct grounding of the cable sections without the need for a separate ground wire connection. In lieu of a single mounting band, the assembly may utilize a pair of U-shaped clamping members. In either embodiment, inwardly projecting holding teeth on the band or clamping members facilitates a secure mounting and ensures conductive contact through any insulating coating on the tubular grounding member.