Product description High-quality 304 stainless steel flat washers designed to reduce pressure and friction, prevent leakage, and help stop fasteners from loosening under load. Key benefits Protects surfaces and reduces wear: Widens load distribution to prevent damage to softer materials and extends the life of assemblies. Improves sealing and vibration resistance: Helps maintain tight joints and reduces the chance of leaks or loosening caused by vibration. Durable corrosion and oxidation resistance: Made from 304 stainless steel for reliable performance in common indoor and outdoor environments. Specifications Sizes available: M3 / M4 / M5 / M6 / M8 / M10 / M12 / M14 / M16 / M18 / M20 / M22 / M24 / M27 Pack quantity: 5 pcs per pack Material: 304 stainless steel Main functions: Reduce pressure and friction, prevent leakage, and help prevent fastener loosening under pressure Performance and compatibility Compatible with standard metric bolts and nuts matching the listed sizes. Suitable wherever a flat washer is needed to distribute load, protect surfaces, or improve joint stability. 304 stainless steel offers good wear resistance and protection against corrosion in typical applications. Common use scenarios Machinery assembly: Use under nut heads or bolt heads to distribute load and protect machined surfaces on motors, gearboxes, and frames. Plumbing and fittings: Improve sealing and reduce the risk of leaks where fasteners clamp pipes, flanges, or brackets. Automotive and outdoor equipment: Help prevent loosening from vibration and protect components exposed to moisture and changing conditions. Package includes 5 stainless steel washers per pack in the specified metric size.