Description: [Material] - These Flat Washer and Lock Washers, made from 304 stainless steel, offer superior corrosion resistance and excellent conductivity. Their durability makes them for outdoor applications. [Wide application] - These Flat Washer and Lock Washers fittings find widespread application in electrical connections across diverse sectors, household and commercial appliances, automotive and marine industries, fuel systems, and hydraulic installations. [Feature] - Flat Washer and Lock Washers serve a crucial function in fastening applications. They distribute the load exerted by threaded bolts, screws, and nuts, ensuring a smooth bearing surface. [Advantage] - Flat Washer and Lock Washers distribute the load over a wider area, preventing stress concentration and potential material failure. This wider contact surface supports and distributes the load, protecting the underlying surface from wear and tear. Furthermore, flat washers help secure the nut by providing a consistent surface, minimizing the chance of loosening due to uneven contact. Specification: Item name: Flat Washer and Lock Washers Material: 304 Stainless steel Thread Size: M5 Flat washers Inner diameter: 5.3mm/0.2inch Flat washers Outside diameter: 10mm/0.39inch Flat washers Thickness: 1mm/0.039inch Lock Washers Inner diameter: 5.25mm/0.206inch Lock Washers Outside diameter: 1.3mm/0.051inch Lock Washers Thickness: 1.3mm/0.051inch Package Content: 50Pcs x Flat washers 50Pcs x Lock washers