Hexagon Socket Head Cap Screw
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Our hexagon socket head cap screw has a head sunken in the center. This structure allows the hexagon socket screw to be fastened tightly by the wrench with little side resistance. The head of the screw can be submerged into the inside of the mechanical parts to help save space. As typical high-strength bolt, our product has strength grade of 8.8, 10.9 or 12.9.
Parameters of Hexagon Socket Head Cap Screw| Executive Standard | DIN912-1983 | |||
| Strength Grade | 12.9 | 10.9 | 8.8 | |
| d≤16 | d > 16 | |||
| Hardness | HRC 39-44 | HRC 32-39 | HRC 22-32 | HRC 23-34 |
| Tensile Strength | 1220N/mm2 | 1040N/mm2 | 800N/mm2 | 830N/mm2 |
| Material | Alloy steel | Carbon steel | ||
| Surface Treatment | Black oxide | |||
| Class of Thread | 5g/6g | 6g | ||
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