... tapping screw,nylock/nylon patch screw,waterproof sealing screws,color head screw and precision shaft and pins.all kinds of screwAdvantage ... disk,camera,electronics,etcall kinds of screwCompany Profile YUEI Precision Co.,Ltd,located at guangdong province,China,is a ... in 1995. We specialize in developing, producing and selling high precision screws, such as hard disk screw, self tapping screw, patch ...