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Galvanized Hexagonal Flange Nut 4.8.8.8 Grade 12.9 - Factory Suppliers from China for Easy Maintenance and Repair
| 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 | / | / | / | ||
| c | Min | 1 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | |
| Min | Min | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
| Max | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 21.6 | ||
| dc | Max | 11.8 | 14.2 | 17.9 | 21.8 | 26 | 29.9 | 34.5 | 42.8 | |
| dw | Min | 9.8 | 12.2 | 15.8 | 19.6 | 23.8 | 27.6 | 31.9 | 39.9 | |
| e | Min | 8.79 | 11.05 | 14.38 | 16.64 | 20.03 | 23.36 | 26.75 | 32.95 | |
| m | Max | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 20 | |
| Min | 4.7 | 5.7 | 7.6 | 9.6 | 11.6 | 13.3 | 15.3 | 18.9 | ||
| mw | Min | 2.2 | 3.1 | 4.5 | 5.5 | 6.7 | 7.8 | 9 | 11.1 | |
| s | Maximum = nominal | 8 | 10 | 13 | 15 | 18 | 21 | 24 | 30 | |
| Min | 7.78 | 9.78 | 12.73 | 14.73 | 17.73 | 20.67 | 23.67 | 29.67 | ||
| r | Max | 0.3 | 0.36 | 0.48 | 0.6 | 0.72 | 0.88 | 0.96 | 1.2 | |
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1. Material: a) Steel, strength grade (material): 8, 10, 12 — DIN ISO 898-2, DIN 267-23 (current draft) b) Stainless steel, strength grade (material): A2-70 — DIN 267-11 c) Other material or grade chosen by the manufacturer |
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Flange nuts have a wide range of applications in the industrial field, especially in mechanical equipment such as compressors, pumps, air conditioners, and fans, playing a crucial role.
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🛡️1. Additional Support & Protection Due to the fact that flange nuts are integrated with washers and nuts, their wide flange design can increase the contact area with the workpiece surface, providing better support and protecting the connecting components. This structure makes it more sturdy and has greater tensile strength than a regular combination of hexagonal nuts and washers.
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🔒2. Anti-Loosening & Improved Sealing The anti-slip teeth and serrated protrusions under the flange nut can evenly distribute the pressure of the nut on the fixed component, creating a locking effect to prevent loosening. At the same time, they can also improve the sealing of the connection, effectively preventing gas or liquid leakage.
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🔇3. Shock Absorption & Noise Reduction Good flange nuts can to some extent reduce the vibration and noise generated by equipment operation, thereby improving the stability and operational efficiency of the equipment.
❓ Frequently Asked Questions
Q What is a DIN 6923 hexagon flange nut?
A DIN 6923 hexagon flange nut is a type of fastener that combines a standard hexagonal nut with an integrated wide flange, functioning similarly to a built-in washer. This design distributes the clamping load over a larger surface area, improving holding strength and protecting the mating surface.
Q What materials are DIN 6923 flange nuts available in?
DIN 6923 flange nuts are commonly available in steel (strength grades 8, 10, and 12 per DIN ISO 898-2) and stainless steel (grade A2-70 per DIN 267-11). Other materials or grades may also be selected by the manufacturer depending on application requirements.
Q What thread sizes are available for DIN 6923 flange nuts?
DIN 6923 flange nuts are available in metric thread sizes ranging from M5 to M20, including M5, M6, M8, M10, M12, M14, M16, and M20, in both coarse and fine thread pitches.
Q What are the main advantages of using flange nuts over standard hex nuts?
Flange nuts offer several advantages over standard hex nuts: they eliminate the need for a separate washer, provide a larger bearing surface to reduce surface damage, feature serrated flanges that resist loosening under vibration, and offer better sealing performance to prevent fluid or gas leakage.
Q In which industries are DIN 6923 flange nuts commonly used?
DIN 6923 flange nuts are widely used across many industries, including automotive, HVAC, industrial machinery, and manufacturing. They are especially common in equipment such as compressors, pumps, air conditioners, and fans where vibration resistance and reliable sealing are critical.
Q How do the serrated teeth on a flange nut prevent loosening?
The serrated or knurled teeth on the underside of the flange bite into the surface of the workpiece when tightened. This mechanical interlocking effect resists rotational movement caused by vibration or dynamic loads, significantly reducing the risk of the nut loosening over time without requiring additional locking mechanisms.