PRODUCT APPLICATIONSThese metal washers for screws and bolts are widely used in furniture assembly, outdoor construction, mechanical maintenance, automotive repair, electrical installation and industrial equipment fastening, etc. They can highly match with screws, nuts and bolts of the same size, providing a stable and aesthetically pleasing fastening effect.PRODUCT DETAILS & INCLUDES? Material: 304 Stainless Steel? Finish: Black Galvanized? Outside Diameter: 5mm/0.2 in? Inside Diameter: 2.5mm/0.1 in? Thickness: 0.5mm/0.02 in? Package Includes: 100Pcs x Flat WasherPRODUCT ADVANTAGES1. The 304 Stainless steel flat washers are made of high-strength material, featuring high strength and resistance to deformation. Its surface is coated with a black coating, which is wear-resistant, corrosion-resistant, resistant to high and low temperatures, and less prone to rust, ensuring long-lasting durability and effectively reducing wear and deformation.2. The washers for bolts have a uniform thickness and smooth edges, which effectively disperse the load pressure of bolts and nuts, and prevent the surface of the fastened material from being damaged or loosened. Their smooth surface can reduce friction and play a role in isolation and leakage prevention. They can be used in combination with an anti-loosening washer to enhance connection stability.INSTALLATIONPlease ensure that the flat washers can be used with the corresponding bolts or screws. Please place the flat washers under the bolt head/nut to ensure that they fit the contact surface flatly.