Description: 1. Model no.: a490m 10s 2. Type:: hexagon head 3. Connection: common bolt 4. Application: building 5. Heat treatment: yes 6. Trademark: sd 7. Origin: ningbo, china 8. Hs code: 7318159090 Features: 1. Head style: hexagonal 2. Finish: dacromet 3. Raw material: 40cr, 35crmo, b7 4. Surface treatment: black, dacromet 5. Material: carbon steel Specifications: 1. Grade: 10.9 2. Standard: ansi 3. Diameter: m12-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