Standard: DIN7991
Product Name: Hex Socket Flat Head Screw
Key Words: DIN7991, Hex socket flat head screw, Countersunk Screw
Size: M3-M42
Material: 10B21, 35CrMo, 40Cr
Stength Grade: 8.8, 10.9
Surface Treatment: White Zinc Plated
Thread Length: Full Thread/ Half Thread
Packing: Bag/Carton/Wooden case
Other Features: Offer customized head mark