DIN 6921 Material:Carbon steel 45#,40Cr,42crmo,stainless steel Finish: ... ,Yellow Zinc Cr+6,H.D.G,etc DIN6921 Hex flange bolts Materials: Carbon steel 45#,40Cr,42crmo,stainless steelGrade: 4 ... bag, 25kg bag or box and bulk in pallet Standards: DIN, ANSI/ASME, BS, GB, JIS & non-standard