... size screw:M1.0~M4.02.High Precision screw3.Be used in high end industries like hard disk,camera,electronics,etc ... 4.ISO9001,ISO14001,TS16949. Products Nameself taping screw SizeM1.0~M4.0 Material Carbon ... precision screw Featured product:High precision screws,machine screw,hard disk screws,self tapping screw,nylock patch screw,waterproof sealing ...