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China DIN 127 Galvanized & Blackened Spring Washer - Quality Supplies from Trusted Factory
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DIN 127 Spring Washer Dimensions — M2 to M14
| Nominal diameter | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | -14 | |
| d | Min | 2.1 | 2.6 | 3.1 | 4.1 | 5.1 | 6.2 | 8.2 | 10.2 | 12.3 | 14.3 |
| Max | 2.3 | 2.8 | 3.3 | 4.4 | 5.4 | 6.7 | 8.7 | 10.7 | 12.8 | 14.9 | |
| h | Public | 0.6 | 0.8 | 1 | 1.2 | 1.6 | 2 | 2.5 | 3 | 3.5 | 4 |
| Min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 | |
| Max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | |
| n | Min | 0.52 | 0.7 | 0.9 | 1.1 | 1.5 | 1.9 | 2.35 | 2.85 | 3.3 | 3.8 |
| Max | 0.68 | 0.9 | 1.1 | 1.3 | 1.7 | 2.1 | 2.65 | 3.15 | 3.7 | 4.2 | |
| H | Min | 1.2 | 1.6 | 2 | 2.4 | 3.2 | 4 | 5 | 6 | 7 | 8 |
| Max | 1.5 | 2.1 | 2.6 | 3 | 4 | 5 | 6.5 | 8 | 9 | 10.5 | |
| 1,000-piece weight (steel) ≈ kg | 0.023 | 0.053 | 0.097 | 0.182 | 0.406 | 0.745 | 1.53 | 2.82 | 4.63 | 6.85 | |
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DIN 127 Spring Washer Dimensions — M16 to M48
| Nominal diameter | 16 | (18) | 20 | (22) | 24 | (27) | 30 | 36 | 42 | 48 | |
| d | Min | 16.3 | 18.3 | 20.5 | 22.5 | 24.5 | 27.5 | 30.5 | 36.6 | 42.6 | 49 |
| Max | 16.9 | 19.1 | 21.3 | 23.3 | 25.5 | 28.5 | 31.5 | 37.8 | 43.8 | 50.2 | |
| h | Public | 4 | 4.5 | 5 | 5 | 6 | 6 | 6.5 | 7 | 8 | 9 |
| Min | 3.8 | 4.3 | 4.8 | 4.8 | 5.8 | 5.8 | 6.2 | 6.7 | 7.7 | 8.7 | |
| Max | 4.2 | 4.7 | 5.2 | 5.2 | 6.2 | 6.2 | 6.8 | 7.3 | 8.3 | 9.3 | |
| n | Min | 3.8 | 4.3 | 4.8 | 4.8 | 5.8 | 5.8 | 6.2 | 6.7 | 7.7 | 8.7 |
| Max | 4.2 | 4.7 | 5.2 | 5.2 | 6.2 | 6.2 | 6.8 | 7.3 | 8.3 | 9.3 | |
| H | Min | 8 | 9 | 10 | 10 | 12 | 12 | 13 | 14 | 16 | 18 |
| Max | 10.5 | 11.5 | 13 | 13 | 15 | 15 | 17 | 18 | 21 | 23 | |
| Nominal diameter | 7.75 | 11 | 15.2 | 16.5 | 26.2 | 28.2 | 37.6 | 51.8 | 78.7 | ||
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Key Functions of Spring Washers
- 🔒 Prevent Looseness: Spring washers provide an additional tightening force to help prevent the loosening of bolts or nuts due to vibration or other factors.
- 📳 Reduce Vibration: Spring washers reduce vibration in mechanical devices, reduce the impact on connecting parts, and protect parts from damage.
- ⚖️ Disperse Pressure: Spring washers have a certain degree of elasticity, can disperse the tightening force of the pressure, and help to protect the connecting parts.
- 🎚️ Adjust Tightening Force: The spring washer can also be used to adjust the tightening force, to ensure that the connecting parts get the appropriate pressure.
- ✅ Safety & Reliability: In general, spring washers play an important role in a variety of mechanical devices to help ensure the safety and reliability of connecting parts.
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Frequently Asked Questions
Q What is a DIN 127 spring washer?
A DIN 127 spring washer is a helical spring-shaped washer standardized under the German DIN 127 specification. It is designed to be placed under a nut or bolt head to provide a locking function by exerting a continuous spring force, preventing loosening caused by vibration or dynamic loads.
Q What materials are DIN 127 spring washers available in?
DIN 127 spring washers are commonly manufactured in carbon steel, stainless steel (A2 / A4), and spring steel. The choice of material depends on the application environment, with stainless steel being preferred for corrosive or outdoor environments.
Q What size range do DIN 127 spring washers cover?
DIN 127 spring washers are available in a wide range of nominal diameters, from M2 up to M48, making them suitable for a broad variety of fastening applications in both light and heavy-duty machinery.
Q How does a spring washer prevent bolt loosening?
When a bolt is tightened, the spring washer is compressed flat. The elastic restoring force of the washer maintains constant pressure between the bolt head and the mating surface, countering any tendency for the bolt to rotate or back off due to vibration or thermal cycling.
Q Can DIN 127 spring washers be reused?
It is generally not recommended to reuse spring washers after they have been fully compressed, as the elastic properties may be reduced. For critical applications, it is best practice to replace spring washers each time the fastener is reassembled to ensure reliable locking performance.
Q What is the difference between DIN 127 Type A and Type B spring washers?
DIN 127 Type A (square ends) and Type B (rounded ends) refer to the finish of the washer's cut ends. Type B has smoothed, rounded ends which reduce the risk of scratching soft surfaces and are more commonly used in general engineering applications, while Type A is used where a stronger bite into the mating surface is desired.