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Commonly used in heavy machinery, industrial applications, and high-pressure environments, these bolts provide unmatched performance.
Befast’s Grade 12.9 Hex Flange Bolts are manufactured with advanced materials and processes, ensuring a premium finish and high resistance to wear, corrosion, and stress.
| Name | Hex Flange Bolts | Materials | Carbon Steel/Stainless Steel |
| Standards | DIN ISO ANC BSW JIS etc. | Strength level | 4.8 8.8 10.9 12.9 A2-70 A4-70 A4-80 |
| Size | M3-M50 | Surface finish | ZPHDGBLACKDacromet etc. |
| Length | 15-500 | Samples | Available |
| Thread specification | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | ||||
| d | ||||||||||||
| P | pitch | coarse teeth | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2 | 2.5 | ||
| fine teeth 1 | / | / | 1 | 1.25 | 1.5 | 1.5 | 1.5 | 1.5 | ||||
| fine teeth 2 | / | / | / | 1 | 1.25 | / | / | / | ||||
| b | L≤125 | 16 | 18 | twenty two | 26 | 30 | 34 | 38 | 46 | |||
| 125＜L≤200 | / | / | 28 | 32 | 36 | 40 | 44 | 52 | ||||
| L＞200 | / | / | / | / | / | / | 57 | 65 | ||||
| c | minimum | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | |||
| d a | Type A | maximum value | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 22.4 | ||
| Type B | maximum value | 6.2 | 7.4 | 10 | 12.6 | 15.2 | 17.7 | 20.7 | 25.7 | |||
| dc | maximum value | 11.8 | 14.2 | 18 | 22.3 | 26.6 | 30.5 | 35 | 43 | |||
| ds | maximum value | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |||
| minimum | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 19.67 | ||||
| of u | maximum value | 5.5 | 6.6 | 9 | 11 | 13.5 | 15.5 | 17.5 | twenty two | |||
| dw | minimum | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |||
| and | minimum | 8.71 | 10.95 | 14.26 | 16.5 | 17.62 | 19.86 | 23.15 | 29.87 | |||
| f | maximum value | 1.4 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | |||
| k | maximum value | 5.4 | 6.6 | 8.1 | 9.2 | 11.5 | 12.8 | 14.4 | 17.1 | |||
| k 1 | minimum | 2 | 2.5 | 3.2 | 3.6 | 4.6 | 5.1 | 5.8 | 6.8 | |||
| r 1 | minimum | 0.25 | 0.4 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | |||
| r 2 | maximum value | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1 | 1.2 | |||
| r 3 | minimum | 0.1 | 0.1 | 0.15 | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 | |||
| r 4 | ≈ | 3 | 3.4 | 4.3 | 4.3 | 6.4 | 6.4 | 6.4 | 8.5 | |||
| s | max = nominal | 8 | 10 | 13 | 15 | 16 | 18 | twenty one | 27 | |||
| minimum | 7.78 | 9.78 | 12.73 | 14.73 | 15.73 | 17.73 | 20.67 | 26.67 | ||||
| t | maximum value | 0.15 | 0.2 | 0.25 | 0.3 | 0.35 | 0.45 | 0.5 | 0.65 | |||
| minimum | 0.05 | 0.05 | 0.1 | 0.15 | 0.15 | 0.2 | 0.25 | 0.3 | ||||
| thread length b | - | - | - | - | - | - | - | - | ||||
The Grade 12.9 Hex Flange Bolts from Befast offer exceptional performance under high loads, with a tensile strength of 1220 MPa. This makes them perfect for industries such as automotive, construction, and mining, where reliability is critical.
Our bolts are produced with precision and undergo extensive testing to ensure their strength and quality. Bulk orders are available for large-scale projects, ensuring your needs are met with efficiency and cost-effectiveness.
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