DIN 7380 Previous Next KOVA manufactures high quality Button Head Bolts (DIN 7380).These bolts are manufactured using high quality Steel Grades 8.8,10.9. Specifications:- Range : M5 To M12 Finish : Black Oxide, Zinc Plating, Hot Dip Galvanized Grade : 8.8,10.9 Standards:- DIN 7380 d M3 M4 M5 M6 M8 M10 M12 M16 P 0,5 0,7.