Hex washer head tapping screw 1.Screw size:ST2.2-ST9.5, #0-#18 2.Screw material:C1022, C1018 3. ... /Zinc Plated Indented Hex washer Head socket Tapping Screw 1.tapping screw Standard DIN6928,JIS B1123, JIS B1126, ISO ... dacromet and etc as per need.4. Head type pan head,oval head, Flat head,Truss head, ... need.6. Points JIS tapping screw M/M Type A, Type B, AISI tapping screw TYPE A, TYPE B (60 degree)7. ...