Our factory specializes in the production of die-cast metal products processing hardware accessories zinc alloy products deserve plug bracket feet: there are two circular needles, just connect FireWire (L) and neutral (N), a non-ground. Typically such plugs can be inserted into the socket in either direction, leaving the plug can be free to change the location of the hot and neutral lines. Generally pin sizes: 4.0mm, 4.8mm, 5.0mm pin plug bracket: There three round pins, connecting FireWire (L) and neutral (N), ground. Usually only one direction a plug can be inserted into the socket, general pins sizes: 4.0mm supply zinc alloy jewelry, 5.0mm, 7.0mm, 8.7mm Dongguan Da Ling Shan Chang Sheng processing hardware store causes: hole caused : The main mechanism of stomatal and contraction zinc alloy products processing plants, stomata tend to be circular zinc alloy jewelry, but most are irregular contractions. (1) pores causes: a liquid metal in the filling and solidification process, due to gas intrusion zinc alloy, lead to the casting surface or internally generated holes. b paint out of the volatile gas intrusion. c alloy liquid gas content is too high, the precipitation during solidification. When the cavity in the gas, the coating volatile gases, gases evolved solidification, when the mold exhaust bad, eventually left in the pores formed in the casting. (2) shrinkage causes: a metal solidification process, because the volume is reduced or the final solidification of liquid metal parts are not feeding, and produce shrinkage. British regulations zinc alloy pins, Chang Sheng Hardware (certified), zinc alloy provided by Dongguan Da Ling Shan Chang Sheng processing hardware store. Dongguan Da Ling Shan Chang Sheng processing hardware store (shop1379091614724.1688.com) is Dongguan, hardware accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang Sheng Hardware in leadership with the staff warmly welcome all inquiries negotiations to create Chang Sheng Hardware a better future.