China Flange Hexagon Bolts Suppliers - High-Strength Galvanized DIN 6921 Factory Products for Industrial Applications
| Thread specifications d |
M5 | M6 | M8 | M10 | M12 | M14 | M16 | M20 | ||
| 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 | 22 | 26 | 30 | 34 | 38 | 46 | |
| 125＜L≤200 | / | / | 28 | 32 | 36 | 40 | 44 | 52 | ||
| L＞200 | / | / | / | / | / | / | 57 | 65 | ||
| c | Min | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | |
| da | Type A | Max | 5.7 | 6.8 | 9.2 | 11.2 | 13.7 | 15.7 | 17.7 | 22.4 |
| Type B | Max | 6.2 | 7.4 | 10 | 12.6 | 15.2 | 17.7 | 20.7 | 25.7 | |
| dc | Max | 11.8 | 14.2 | 18 | 22.3 | 26.6 | 30.5 | 35 | 43 | |
| ds | Max | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
| Min | 4.82 | 5.82 | 7.78 | 9.78 | 11.73 | 13.73 | 15.73 | 19.67 | ||
| du | Max | 5.5 | 6.6 | 9 | 11 | 13.5 | 15.5 | 17.5 | 22 | |
| dw | Min | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |
| e | Min | 8.71 | 10.95 | 14.26 | 16.5 | 17.62 | 19.86 | 23.15 | 29.87 | |
| f | Max | 1.4 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | |
| k | Max | 5.4 | 6.6 | 8.1 | 9.2 | 11.5 | 12.8 | 14.4 | 17.1 | |
| k1 | Min | 2 | 2.5 | 3.2 | 3.6 | 4.6 | 5.1 | 5.8 | 6.8 | |
| r1 | Min | 0.25 | 0.4 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | |
| r2 | Max | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.9 | 1 | 1.2 | |
| r3 | Min | 0.1 | 0.15 | 0.2 | 0.25 | 0.3 | 0.35 | 0.4 | ||
| r4 | ≈ | 3 | 3.4 | 4.3 | 4.3 | 6.4 | 6.4 | 6.4 | 8.5 | |
| s | Max=Public | 8 | 10 | 13 | 15 | 16 | 18 | 21 | 27 | |
| Min | 7.78 | 9.78 | 12.73 | 14.73 | 15.73 | 17.73 | 20.67 | 26.67 | ||
| t | Max | 0.15 | 0.2 | 0.25 | 0.3 | 0.35 | 0.45 | 0.5 | 0.65 | |
| Min | 0.05 | 0.05 | 0.1 | 0.15 | 0.15 | 0.2 | 0.25 | 0.3 | ||
| Thread length b | - | - | - | - | - | - | - | - | ||
|
1, e Min. = 1.12 x S Min.
2, material: a) steel, strength class (material): 8.8, 10.9, 12.9, Din Iso 898-1 b) stainless steel, strength class (material): A2-70, DIN 267-11 |
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The flange hexagonal bolt has a large tightening force, which can firmly connect the flange and the connected components, ensuring the stability of the connection.
1. bPower transmission: It can not only transmit fastening force, but also transmit the power required by machines, equipment, etc.
2. Ensure sealing: The use of flange hexagonal bolts can isolate the connection from external media and ensure the sealing of the device.
3. Capable of withstanding higher preload force: Due to its "support area to stress area ratio" being greater than that of ordinary bolts, flange hexagonal bolts can withstand higher preload force and have better anti loosening performance.
What are the material strength classes available for these flange bolts?
According to the specifications, they are available in steel with strength classes 8.8, 10.9, and 12.9 (per DIN ISO 898-1), as well as stainless steel class A2-70 (per DIN 267-11).
Why choose flange hexagonal bolts over ordinary hexagon bolts?
Flange hexagonal bolts have a larger "support area to stress area ratio," allowing them to withstand higher preload forces and providing superior anti-loosening performance without requiring separate washers.
Do these flange bolts support fine thread options?
Yes, depending on the thread diameter (d), the specification provides options for Coarse Teeth, Fine Teeth 1, and Fine Teeth 2 thread pitches.
How does the flange bolt ensure sealing?
The integrated flange creates a wider and more uniform contact surface, effectively isolating the connection from external media to guarantee the sealing of the connected device.
What is the relationship between the width across corners (e) and width across flats (s)?
As specified in the technical notes, the minimum width across corners (e Min.) is calculated as 1.12 times the minimum width across flats (S Min.).