Zamak5 Connector Nut Housing Pass 500H NSS Salt Spray Test in China Die Cast. Enchuang Precision die casting factory located in Dongguan Guangdong Province, China. The connector enclosure dimension is checked by CMM, caliper, height gauge, thread gauge, and so on. The color meets the confirmed sample that we sign before mass production. The connector shells appearance with no damage, scratch,exposed base layer, bubble, deformation, drag marks, sand hole.