Class 4.8 and 6.8 and 8.8 and 10.9 1. Standard: DIN603 2. Class: 4.8 6.8 8.8 10.9 3. Type: Mushroom Head Square Neck 4. Heat Treatment: Yes 5. Surface Treatment: HDG, Black, ZINC, YZP, Plain, Dacromet 6. Material: Carbon Steel, Stainless Steel 7. Connection: Common Bolt Our commitments 1. High quality 2. Competitive price 3. The shortest delivery 4. The fastest response 5. Custom-design and Logo are welcomed