M5 Stainless Steel Curved (Belleville) Washer DIN 137 A A2

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Description

The DIN 137 A A2 M5 stainless steel curved washer (also known as a spring or Belleville washer) is designed to provide pre-load, absorb shock and maintain tension in threaded assemblies. Made from A2 (AISI 304) stainless steel, this washer offers good corrosion resistance and long-lasting performance in both indoor and outdoor environments. Curved washers feature a convex profile that compresses slightly under load, creating spring action that helps compensate for joint relaxation, vibration and dynamic loads. They are ideal for maintaining tension in bolted connections, reducing loosening and improving overall joint reliability.

Technical Specifications — DIN 137 A A2 M5

  • Standard: DIN 137 A (curved/spring washer)
  • Thread size (d1): M5
  • Material: A2 stainless steel (AISI 304)
  • Outer diameter (d2): ~10.0 mm
  • Inner diameter (d1): ~5.3 mm
  • Thickness (solid): ~0.5 mm
  • Height (unsprung): ~0.90–1.80 mm
  • Feature: Curved spring washer — provides preload and vibration resilience
  • Applications: Machinery, metalwork, automotive assemblies, frames, enclosures and dynamic fastenings

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