Threaded pipe plugs are a common form of packaging for various holes, especially in the fields of beverages, chemicals, and machinery. There are different kinds, such as square head plug and hex head plug and round head bushing and etc. Pipe threads are threads located on the pipe wall for connection. They are mainly used to connect pipes to make the internal and external threads fit tightly. It has round, square, and hexagonal structures. It has a simple structure and reliable sealing, and is an ideal choice for solving pipe or hole plugging problems.