Nowadays, cable connectors are particularly frequently used in industry. Waterproof cable connectors can be divided into two categories according to the production materials. One type is plastic cable connectors, and the other type is metal cable connectors. From the name, it can be known that plastic cable connectors are made of plastic as raw materials, while metal cable connectors are made of metal materials with machined surfaces, usually made of stainless steel or brass, and then covered with nickel on the surface. Plastic cable joints have stronger waterproof performance, simple process, and low price, while metal cable joints have good explosion-proof performance, slightly higher price, and are durable.