Cup head square neck bolt
Features:
1. Standard: DIN, ANSI, BSW, JIS, etc.
2. Material: carbon steel
3. Size: M6-20mm
4. Length: 16mm-200mm
5. Grade: 4.8-6.8-8.8-10.9-12.9
6. Finish: plain, black, HDG, zinc plated, etc.