1. Connector commonly used in the classification is as follows:
1) shape: circular electrical connectors, rectangular electrical connectors. Circular electrical connectors due to the characteristics of their own structure on the military equipment (aviation, aerospace) the largest amount. Rectangular electrical connectors because of its simple structure, printed circuit boards for electronic devices.
2) by the structure: connections: threaded connection, bayonet (fast) connection, the card lock connected to the push-pull connection, in-line connection; contact termination in the form of: crimping, soldering, wire wrap; screw (cap) fixed; environmental protection: environmental resistance electrical connectors and ordinary electrical connectors
3) Purpose: RF electrical connectors sealed electrical connectors (glass seal welding) high-temperature electrical connectors automatically fall off the separation power connector filter electrical connectors composite electrical connector airport power electrical connectors PCB electricity connection etc.

2. The electrical connector structure electrically connected by the fixed-side electrical connector (hereinafter referred to as the outlet), the free end of the electrical connector (hereinafter referred to as plugs) composition. Outlet side (circle) plate in the electric parts (individual also uses welding), plug in general cables by connecting nut plug and socket connection. The electrical connector from the shell, an insulator, composed of three basic units of the contact body. Shell - electrical connector shell is the shell of the plug and socket connection nut, tail attachment. Housing role is to protect the insulator and the contact body (pin jack commonly known), the internal parts of electrical connectors from damage. The above positioning keyway to ensure that the plug and socket positioning. Connection nut for socket connection and separation. Tail attachment is used to protect the wires and the contact body terminated at from damage and secure the cable. The shell also has a certain electromagnetic shielding effect. The shell is generally made of aluminum alloy processing (machining, cold extrusion, die-casting) is made. The steel shell is used for the glass seal welding and high temperature resistant electrical connectors. Insulator - installed pin insulators mounted jack insulator. Interface seal body seal line body composition. Used to maintain the electrical insulation between the pin jack on the set position, and each contact body and the contact between the body shell. Insulator and interface seal body seal line body to obtain the seal of measures to improve the resistance to the environmental performance of electrical connectors.