Power fittings are iron or aluminum metal accessories used for transmission lines, collectively known as fittings. They can be categorized into types such as suspension clamp, tension clamp, U-shaped clamp, connecting fitting, joint fitting, protective fitting, equipment clamp, T-shaped clamp, busbar fitting, and tensioning fitting, based on their function and structure; and they can be used as line fittings or substation fittings according to their purpose.