The gas regulator with non-metal components comprises a diaphragm (4), a body (1), an adjustment screw (2), and a cap (3) made of a non-metal thermoplastic material with molded threads. The body (1) is connected to the cap (3) via a large-diameter thread (6), and the adjustment screw (2) is mounted in the cap via a small diameter thread (5); the molded threads on the cap (3) have an equal pitch h and are arranged coaxially. The cap (3), the adjustment screw (2) and the body (1) are made of glass-nylon composite with molded coaxial threads.