Hardware & Tools
Large Hexagon Head Structural Steel Bolt
Certifications
GB/T 1228GB/T 1229GB/T 1230GB 50205-2001
Description
This product is a large hexagon head structural steel bolt for friction-type connections in steel structures such as long-span bridges and high-rise buildings. Complies with GB/T 1228～1231 standard, multiple specifications, supplied with nut and washer as a connection pair.
Specifications
| S max | 21, 27, 34, 36, 41, 46, 50 |
| S min | 20.16, 26.16, 33, 35, 40, 45, 49 |
| k max | 7.95, 10.75, 13.40, 14.90, 15.90, 17.90, 19.75 |
| k min | 7.05, 9.25, 11.60, 13.10, 14.10, 16.10, 17.65 |
| r min | 1.0, 1.0, 1.5, 1.5, 1.5, 2.0, 2.0 |
| dw min | 19.2, 24.9, 31.4, 33.3, 38.0, 42.8, 46.5 |
| k' min | 4.9, 6.5, 8.1, 9.2, 9.9, 11.3, 12.4 |
| Pitch P | 1.75, 2, 2.5, 2.5, 3, 3, 3.5 |
| Performance Grade | 10.9S, 8.8S |
| Thread Specification | M12, M16, M20, M22, M24, M27, M30 |
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