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High Strength Full Thread 12.9 Hex Allen Key Bolt DIN,DIN912 8.8/10.9/12.9 M3-M52
1. Material Grade:4140(42CrMo)
2. Quality Level: 12.9, 10.9, 8.8, 6.8, 4.8 Grade
3. Sizes: M20,M24, M27,M30,M36,M42,M45;
4. Specification:M48 x 150,M48 x 180,M48 x 210,M48 x 330,M48 x 370,M48 x 390,M48 x 600,M48 x 700,M48 x 900,M48 x 1080
5. Bolt-head Shape: Oval head, Square head,Ellipse head;
6. Special Features:
1. The high strength bolts have been widely used in large ball mills up to dia.12-meter mills.
2. The high strength screws can be reliably used in small,middle and large cement mills,coal mils and mine mills.
3. The high strength bolts have been properly heat-treated to achieve better mechanical properties.
4. The standard bolt units include one rubber ring,concave washer,spring washer and nut.
7. Chemical Composition:
| Composition(%) | C | Si | Mn | S | P | Cr | Mo |
| 42CrMo(4140 Grade8.8) | 0.38-0.45 | ≤0.40 | 0.60-0.90 | ≤0.035 | ≤0.035 | 0.90-1.20 | 0.15-0.30 |
8. Product Details Picture: