Wave washer is a ring‑shaped elastic washer with wave‑formed surface. It generates elastic force under compression to maintain clamping load, compensate assembly gaps and absorb vibration and shock. Compared with split spring washers, it delivers uniform pressure and will not scratch mating surfaces. Material: carbon steel, spring steel, stainless steel 304 / 316. Finishes: blue‑white zinc plated, color zinc plated, natural passivation. Widely used in precision machinery, electrical equipment, motors, automotive and light‑duty vibration‑prone assemblies.