over fitting UB Series Clevis Hinges/ Anchor Shackle Electric Fitting UB type clevises are mainly suitable for hanging suspension insulator string (composed of suspension insulator & suspension clamp) on the conductor subjected to the pole or tower; on the other hand, they are also used for hanging tension insulator string (composed of suspension insulator & tension clamp) on the tension conductor subjected to the pole or tower. High Quality UB Type Clevises National Grid