1,DIN608 Flat Countersunk Square Neck Bolt standard 2,Competitive price 3,Fast delivery time 4,Nice quality 1. Standard of DIN608 2. Material :Carbon steel 3. Dimension : M6-M20 4. Surface treatment:: Zinc,Nickel plated,Black Oxide,HDG,Dacromet,etc 5. Packing:Bulk,small box,color box 7. Delivery time: Within 45 days or based on your quantity. DIN608 Flat Countersunk Square Neck Bolt