brief introduction: The BNC connector (Bayonet Neill-Contelman) is a very common coaxial cable terminator for RF terminals. The BNC cable connector consists of a center pin, a jacket and a holder, which comprises three parts: the BNC connector base, a jacket and a probe. BNC connector classification: A.BNC-T head, used to connect the computer network card and the cable in the network; B.BNC barrel-type connector for connecting two thin cables into a longer cable; C.BNC cable connector for welding or screwing at the