DIN137A Wave Spring Washers
DIN 137A Wave Spring Washers, also known as curved spring washers, are compact elastic components designed for small fastening assemblies requiring continuous spring pressure. The curved washer profile provides controlled deflection during compression, helping compensate for minor assembly variations, maintain contact pressure, and improve connection stability in limited installation spaces.
Available in diameters from Ø1 mm to Ø10 mm, DIN 137A wave washers are manufactured from 65Mn spring steel for excellent elasticity and fatigue resistance, as well as stainless steel 304 and 316 for applications requiring corrosion resistance. Their small size and reliable spring performance make them suitable for precision instruments, electrical components, miniature mechanisms, sensors, and compact mechanical assemblies.
Specification:
The specification of DIN 137A Wave Spring Washers covers the dimensional requirements, material options, and production characteristics for small-size fastening applications. Key specifications include inside diameter, outside diameter, material thickness, free height, wave profile, material grade, and surface condition, which influence the washer’s spring performance and assembly compatibility.
DIN 137A curved spring washers are available in diameters from Ø1 mm to Ø10 mm. Standard materials include 65Mn spring steel for applications requiring stable elasticity and repeated compression performance, and stainless steel 304/316 for environments exposed to moisture or corrosion. Customized dimensions, finishes, and packaging options can be supplied according to specific assembly requirements.
| Item | Specification |
|---|---|
| Standard | DIN137A |
| Product Type | Wave Spring Washer/Curved Spring Washer |
| Diamter Range | Φ1-Φ10 |
| Material | Spring Steel 65Mn,Stainless Steel 304, Stainless Steel 316 |
| Surface Treatment | Plain,Passivation,Zinc Plated,Black Oxidation,Mechanical Zinc Plated |
Dimension Chart of DIN137A Wave Spring Washers:
The dimension chart of DIN 137A Wave Spring Washers provides the key measurements required for selecting the correct washer in small-size fastening assemblies. The chart includes critical dimensions such as inside diameter (d1), outside diameter (d2), material thickness (s), free height (h), and wave height, which determine the washer’s spring travel and installation compatibility. Due to their compact size, DIN 137A washers require accurate dimensional control to achieve consistent elastic performance during compression. Available in diameters from Ø1 mm to Ø10 mm, these curved spring washers are manufactured according to DIN 137A dimensional requirements and can be supplied in different thicknesses and materials to meet specific assembly conditions.
| Mon | Φ1.7 | Φ1.8 | Φ2 | Φ2.3 | Φ2.5 | Φ2.6 | Φ3 | Φ3.5 | Φ4 | Φ5 | Φ6 | Φ7 | Φ8 | Φ10 |
| d max | 2.05 | 2.15 | 2.45 | 2.75 | 3.05 | 3.05 | 3.5 | 4 | 4.6 | 5.6 | 6.76 | 7.76 | 8.76 | 10.93 |
| d min | 1.8 | 1.9 | 2.2 | 2.5 | 2.8 | 2.8 | 3.2 | 3.7 | 4.3 | 5.3 | 6.4 | 7.4 | 8.4 | 10.5 |
| dc max | 4.375 | 4.375 | 4.875 | 5.375 | 5.875 | 5.875 | 6.375 | 7.45 | 8.45 | 10.45 | 11.55 | 12.55 | 15.55 | 18.55 |
| dc min | 3.625 | 3.625 | 4.125 | 4.625 | 5.125 | 5.125 | 5.625 | 6.55 | 7.55 | 9.55 | 10.45 | 11.45 | 14.45 | 17.45 |
| h max | 0.27 | 0.27 | 0.33 | 0.33 | 0.33 | 0.33 | 0.45 | 0.45 | 0.55 | 0.55 | 0.55 | 0.55 | 0.55 | 0.86 |
| h min | 0.23 | 0.23 | 0.27 | 0.27 | 0.27 | 0.27 | 0.35 | 0.35 | 0.45 | 0.45 | 0.45 | 0.45 | 0.45 | 0.74 |
| H min | 0.45 | 0.45 | 0.5 | 0.5 | 0.55 | 0.55 | 0.65 | 0.7 | 0.8 | 0.9 | 1.1 | 1.2 | 1.7 | 2 |
| H max | 0.9 | 0.9 | 1 | 1 | 1.1 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 2.2 | 2.4 | 3.4 | 4 |
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Application of DIN137A Wave Spring Washers:
With diameters from Ø1 mm to Ø10 mm, DIN 137A Wave Spring Washers are particularly suitable for assemblies where conventional washers leave little room for a spring element. Their curved profile can take up small dimensional variations and maintain pressure between mating components without requiring a large installation area. Typical applications include miniature motors, switches, relays, sensors, measuring instruments, small gear mechanisms, and compact electrical assemblies.
For mechanical components subjected to repeated compression, 65Mn spring steel is commonly selected for its elasticity and fatigue resistance. Stainless steel 304 is a practical choice for general moisture-resistant applications, while 316 is better suited to marine, chemical, and other more corrosive environments. These material options allow DIN 137A washers to be selected according to both the mechanical requirements of the assembly and the surrounding operating conditions.