Abstract: A siding splice joint contains: a body, multiple washers, and multiple screws. The body includes a first face, a second face, and multiple through holes. A respective washer is injection molded on a respective through hole and includes a thin portion, a thick portion, a connection portion, and a lock orifice. The thick portion of the respective washer is connected on the first face, the thick portion of the respective washer is connected on the second face, and the connection portion is inserted through the respective through hole. A respective screw includes a head, an extension shank integrally extending from the head, and a tip formed on the extension shank away from the head. The extension shank is screwed in the locking orifice of the respective washer so that the respective screw is not locked on but connected with the respective washer.