... ,Black Oxide,HDG Roofing bolt 1. Standard:DIN, ANSI, BSW, JSB ans ISO standard or non-standard as request&design.2. Material:Carbon ... Dimension : M5-M20 or as request5. OEM&Customize non-standard products welcome.6. Surface treatment:Plain, black finished, Zinc plated ... Nickel, phosphate black, DACROMET coating, etc.7. Packing:Carbon, Pallet. or accoding to requirement8. Delivery time:within 7 days or ...