Abstract: A plastic tie member for mounting a transducer cable on a chain link fence comprises a flexible strap having two spaced apertured heads at one end arranged, when the member is tied, to snugly clamp the cable to a fence strand while maintaining them in a physically spaced relation. The effective space between the heads is substantially the same as the circumference of the cable so as to form a pocket, when the member is in the tied position, in which the cable snugly gripped with a predetermined constant force independent of the clamping force on the fence strand. This insures against excessive clamping forces on the cable, prevents damage to cable from burrs and the like on the fence strands, and maintains an efficient vibration-sensitive coupling between cable and fence.