The RJ45 plug, also known as the RJ45 Modular Plug, is used for termination of data cables to enable connection and change of equipment and patch panel modules. The RJ45 crystal head is required to have good conduction performance; the contact trigeminal reed has a gold plating thickness of 50μm, which satisfies the super 5 transmission standard and conforms to the T568A and T568B line sequences; and has the functions of preventing looseness, insertion and removal, and self-locking.