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Galvanized Hexagonal Flange Nut 4.8.8.8 Grade 12.9 - Reliable China Suppliers & Factory Solutions
| 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 | |
📋 Material Specifications:
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
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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Key Applications & Advantages of Flange Nuts
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Additional Support & ProtectionFlange nuts are integrated with washers and nuts, featuring a wide flange design that increases the contact area with the workpiece surface, providing better support and protecting the connecting components. This structure makes it more sturdy and offers greater tensile strength than a regular combination of hexagonal nuts and washers.
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Anti-Loosening & Improved SealingThe anti-slip teeth and serrated protrusions under the flange nut evenly distribute pressure on the fixed component, creating a reliable locking effect to prevent loosening. At the same time, they improve the sealing of the connection, effectively preventing gas or liquid leakage.
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Shock Absorption & Noise ReductionGood 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 — especially in compressors, pumps, air conditioners, and fans.
❓ Frequently Asked Questions
Q
What is a DIN 6923 hexagon flange nut?
A DIN 6923 hexagon flange nut is a standardized fastener that combines a hexagonal nut with an integrated wide flange (washer-like base). This design distributes clamping load over a larger surface area, providing enhanced holding strength and resistance to loosening compared to standard hex nuts.
Q
What materials are DIN 6923 flange nuts available in?
DIN 6923 flange nuts are available in steel (strength grades 8, 10, and 12 per DIN ISO 898-2), stainless steel (grade A2-70 per DIN 267-11), and other materials or grades as chosen by the manufacturer.
Q
What thread sizes are available for DIN 6923 flange nuts?
DIN 6923 flange nuts are available in thread sizes ranging from M5 to M20, including M5, M6, M8, M10, M12, M14, M16, and M20, with both coarse and fine thread pitch options depending on the size.
Q
What industries commonly use DIN 6923 hexagon flange nuts?
DIN 6923 flange nuts are widely used in mechanical equipment industries including compressors, pumps, air conditioning systems, and fans. Their vibration-resistant and sealing properties make them ideal for any application requiring secure, leak-proof fastening.
Q
How do flange nuts prevent loosening compared to standard hex nuts?
Flange nuts feature serrated or anti-slip teeth on the underside of the flange. These protrusions bite into the workpiece surface when tightened, creating a mechanical locking effect that resists vibration-induced loosening — eliminating the need for a separate lock washer in many applications.
Q
Can DIN 6923 flange nuts be used for sealing applications?
Yes. The wide flange base of DIN 6923 nuts increases the bearing surface and helps create a tighter, more uniform seal between the nut and the mating component. This makes them suitable for applications where preventing gas or liquid leakage is important, such as in pumps and compressors.