DIN137A Curved Metric Spring Washer

The DIN137A Curved Metric Spring Washer, relying on its own properties, has developed unique core advantages and can play its role in various working scenarios.

（1）Flexible and stable, long-lasting.

The overall arc-shaped structure distributes the force evenly, has good resilience, and is not likely to shake even under long-term vibration. It can continuously apply preload to the fasteners.

（2）The buffering and shock absorption effect is excellent.

The arc-shaped deformation of the DIN137A Curved Metric Spring Washer can absorb the vibrations, slight displacements and gaps caused by thermal expansion and contraction of the equipment, reducing the collision and wear of parts.

（3）Installation is simple and adaptable.

When using the installation washer, no special tools are required. Just simply place it over the bolt for use; it is compatible with conventional standard bolts, occupies little installation space, and is suitable for use in narrow assembly spaces.

（4）Stress leveling

The DIN137A Curved Metric Spring Washer has no sharp edges or protruding corners, and will not scratch the surface of the workpiece. It is suitable for materials that are prone to damage such as aluminum, plastic, and precision components.

（5）Reliable anti-loosening performance

By relying on its own curved elasticity, it effectively prevents the loosening of the bolts, meeting the anti-loosening requirements for light-load and medium-vibration equipment.

（6）Long service life

The DIN137A Curved Metric Spring Washer is in an overall closed loop shape without any gaps, making it less prone to breaking or deforming. It is also compatible with surface treatments such as galvanization and duralumin, providing rust prevention and corrosion resistance. It is suitable for various indoor and outdoor working conditions.

（7）High cost-performance ratio

Simple structure, mature for mass production, suitable for large-scale general assembly.

Mon	ɸ2	ɸ2.5	ɸ3	ɸ4	ɸ5	ɸ6	ɸ8	ɸ10
d min	2.2	2.7	3.2	4.3	5.3	6.4	8.4	10.5
d max	2.45	2.95	3.5	4.6	5.6	6.76	8.76	10.93
dc min	4.2	5.2	5.7	7.64	9.64	10.57	14.57	17.57
dc max	4.5	5.5	6	8	10	11	15	18
H min	0.5	0.55	0.65	0.8	0.9	1.1	1.7	2
H max	1	1.1	1.3	1.6	1.8	2.2	3.4	4
h	0.3	0.3	0.4	0.5	0.5	0.5	0.5	0.8

questions and answers

（1）What is the temperature range for DIN137A Curved Metric Spring Washer?

Spring steel material: -20°C ~ +120°C; Stainless steel A2/A4: -200°C ~ +300°C; Beyond 120°C, the spring elasticity of the spring steel will decrease.

（2）Can you provide a material certificate for each batch?

Yes. For each batch of shipment, the factory material certificate is provided by default, which shows the chemical composition and hardness.

（3）Do you provide samples for testing?

OK. Standard-sized sample stocks are provided free of charge. The delivery time is approximately 3-5 days. Please inform us about the size and material requirements.