... Precision screw3.Be used in high end industries like hard disk,camera,electronics,etc 4.ISO9001,ISO14001,TS16949. Products Nameself ... precision screw Featured product:High precision screws,machine screw,hard disk screws,self tapping screw,nylock patch screw,waterproof sealing ... developing, producing and selling high precision screws, such as hard disk screw, self tapping screw, patch screw, water-proof ...