Ball ScrewMade in China Factory One-Stop Service Stainless Steel 410, 304, 316 Hexagon (Hex) Head Self-Drilling Screw DIN7504 (K) , ISO15480, ASME B18.64, Find details about China Self-Drilling Screw, DIN7504 from Made in China Factory One-Stop Service Stainless Steel 410, 304, 316 Hexagon (Hex) Head Self-Drilling Screw DIN7504 (K) , ISO15480, ASME B18.64