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, U-shaped tension clamp, connecting fittings, splicing fittings, protective fittings, equipment clamp, T-shaped clamp, busbar fittings, and tensioning fittings; by application, they can be used as line fittings and substation fittings.