Abstract: A clamping attachment for tensile pulling devices has a pair of clamping members designed to be arranged side by side, the members each being designed to provide one of a pair of facing jaws. The clamping members and the jaws are arranged to allow the jaws to grasp a member between them. The jaws are each provided with bores designed to be aligned when they are grasping a member between them and a bolt is provided designed to extend through the aligned bores, the bolt having a head on one end and a nut on the other. Each of the bores at their outwardly facing ends is enlarged to provide a surface defining a cavity at the corresponding entrance to the bores. Bearing members are provided adjacent each and of the bolt designed to contact the respective surfaces of the cavities and to bear thereon as the nut is tightened.