Flat washers are core industrial fasteners for connections. Materials include stainless steel, carbon steel, nylon, etc., compliant with international standards such as DIN, GB, ISO, with full size coverage from M2 to M30. Core advantages include load distribution, surface protection, anti-loosening and shock absorption. Suitable for machinery, automotive, electronics, construction and other scenarios. Custom sizes, materials and surface treatments are available. High precision with no burrs, stable bulk supply, helping all types of connection assemblies be safer and more efficient.