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HANSAN SCREW CO., LTD.
All Products
Hex Socket Head Cap Bolt
| Strength type | 12.9 | 10.9 | 8.8 |
| Material | Structural alloy steel | Structural alloy steel | Structural alloy steel, structural carbon steel |
| Hardness(HRC) | 39-44 | 32-39 | D≤16 22~32 d＞16 23~34 |
| Precision class | JIS 5g 6g | JIS 6g | JIS 6g |
| Part grade | A | A | A |
| Surface treatment | Black oxide coating | Black oxide coating | Black oxide coating |
