Standard: DIN933
Product Name: Hex Head Bolt Black Oxide
Key Words: DIN 933, 8.8 Grade
Size: M3-M42
Material: 10B21, 35K, 45# steel
Stength Grade: 8.8 Grade
Surface Treatment: Black Oxide
Thread Length: Full Thread
Thread Type: Coarse/Fine
Packing: Bag/Carton/Wooden case
Other Features: Offer customized head mark.