Metal joints

Used in a variety of connectors on the car. These Hydraulic tube fittings are made ​​from steel or lead quality, and surface paint, to avoid rust rot. Generally use special seals joints, because the protective order to seal joints only afraid of vibration, and reliable sealing. When installing fittings, rubber seal ring must use fluoride-resistant rubber ring; and fitted with rubber ring, which must be the same size and connector specifications, and the surface needs to apply refrigeration oil. When tightening the nut, the joint can not move, gently tighten with a wrench, but not too tight, otherwise it will cause leakage.