... 50mm, Coating : black, zinc,HDG Hex Flange BOLT DIN69211) Standard of Hex Flange bolt DIN6921: DIN 6921, ANSI/ASME, ... to 12.9, Grade2-Grade10. 4) Dimension of Hex Flange bolt DIN6921: 5mm-20mm, 1/8"_3/4"5 ... ) Length of Hex Flange bolt DIN6921: From10mm to 50mm, 1/2"---20", we ... produce according to your requirement6) Coating of Hex Flange bolt DIN6921: Plain, black, zinc, HDG, Hex flang ...