Description 1. Model no.: din6923 2. High tensile: yes 3. Trademark: sd 4. Origin: ningbo, china 5. Hs code: 7318160000 Features 1. Material: carbon steel 2. Head style: hexagonal 3. Type: round head 4. Surface treatment: black, zinc yellow, h.D.G. Specification 1. Model no.: din6923 2. Diameter: m6-m36 3. Standard: din 4. Grade: class8 Competitive advantages 1. Top quality control 2. Competitive price 3. Various of design 4. Oem accepted 5. Customer's design and logo are welcome