Description 1. Model no.: din6921 2. Connection: common bolt 3. Application: building 4. Heat treatment: yes 5. Trademark: sd 6. Origin: ningbo, china 7. Hs code: 7315189090 Features 1. Material: carbon steel 2. Type: hexagon head 3. Head style: hexagonal 4. Finish: black 5. Surface treatment: zinc yellow, black finish Specification 1. Model no.: din6921 2. Standard: din 3. Grade: 8.8 4. Diameter: m6-m36 Competitive advantages 1. Top quality control 2. Competitive price 3. Various of design 4. Oem accepted 5. Customer's design and logo are welcome