ISO7379 Hexagon socket head shoulder screws

Hexagon socket head shoulder screws Standard: ISO7379; GB5281 Size: 6.5MM-25MM Material: Carbon Steel, Alloy Steel, Stainless Steel, Brass Grade: ASTM A307Gr.A, Class 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 Thread: M, UNC, UNF Finish: Plain, Zinc Plated(Clear/Blue/Yellow/Black), Black oxide, Nickel, Chrome, H.D.G Packing: bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand Application: Structural Steel; Metal Building; Oil&Gas; Tower&Pole; Wind Energy;