Power fittings are iron or aluminum metal accessories used for transmission lines, collectively known as fittings. They can be classified into categories such as suspension clamp, tension clamp, UT clamp, connecting fitting, jointing fitting, protective fitting, equipment clamp, T-type clamp, busbar fitting, and guy wire fitting, based on their function and structure; and can be used as line fittings or substation fittings based on their application.