Patent ID: 8399770

Claim:
In an electric power transmission system comprising a support structure and an arm carried by the support structure, the arm having a first surface, a second surface oppositely situated the first surface, and at least one hole therethrough between the first surface and the second surface for suspending a conductor via at least an insulator, an arm attachment bushing assembly comprising: a first bushing element having a first end, a second end, a first outer surface with a first outer diameter, a first inner surface, and a first flange positioned proximate the first end and extending outward from the first outer surface, the first flange engaging the first surface of the arm when the arm attachment bushing assembly engages the arm of the support structure; and a second bushing element receiving at least a portion of the first bushing element, the second bushing element having a first end, a second end, a second inner surface having a second inner diameter greater than the first outer diameter, a second outer surface, and a second flange positioned proximate the second end and extending outward from the second outer surface, the second flange engaging the second surface of the arm when the arm attachment bushing assembly engages the arm of the support structure, wherein the hole receives at least a portion of the arm attachment bushing assembly such that the first inner surface of the first bushing element defines a channel from the first surface of the arm to the second surface of the arm, and wherein at least a portion of the first outer surface comprises male helical threads and at least a portion of the second inner surface comprises female helical threads for cooperative engagement with the male helical threads.