Industrial plugs, sockets, cable coupling device and tool socket, (hereinafter referred to as electrical accessories, the AC rated voltage not exceeding 660V, DC does not exceed 440V, rated current less than 63A, rated frequency does not exceed 50 / 60Hz, use environment temperature -25+40 DEG C of corrosion and explosion of explosive gas and conductive dust. The product is waterproof and dust-proof, splash proof, anti-corrosion, anti misplug, anti dropping, natural resistance resistance to high temperature aging etc. many superior characteristics, main product contact parts are made by H59-1 copper, the power socket with spring clamp function, ensure close contact with conductive advantages, shell color said the use of different voltage and frequency, different position, diameter, number of poles are not the same and misplug prevention.