Composition of automobile valve core

The automobile valve core is composed of intake pipe, valve stem and hollow nut. The intake pipe is inserted into the stop of the hollow nut. The bottom of the valve rod in the center of the intake pipe is provided with a cone, a rubber gasket and a washer. The upper part of the valve stem passes through the flat platform hole of the hollow nut, and the valve stem is provided with spring and retaining ring at the top.