This PTO screw assembly a small screw assembly(Agriculture Machine Parts), mainly made of materials such as sheet metal, bar stock, and hexagonal steel, and produced through sawing, stamping, threading, and welding processes. After electroplating, various parts are assembled into the assembly. This assembly is used in the power output system of tractors. The structure of the assembly is designed to be exquisite and easy to assemble, and it is an essential component of tractors.