... 33H 45H A2-21 A4-21 Finish:Black,Passivated,Zinc Hexagon socket set screws with flat point DIN913Material:Stainless Steel,Carbon Steel,Alloy Steel1) Various kinds ... bright, zinc plated, black4) Can be made with different standards, such as ISO, DIN, ANSI, BS and special standard according ... and products infos for your reference.Welcome customerized drawings. Hexagon socket set screw with flat point