The selection between flat washers and spring washers depends on specific scenarios. In static or low-vibration applications, prioritize flat washers to protect surfaces and facilitate disassembly. For high-vibration or dynamic load scenarios, combine both types to leverage the anti-loosening benefits of spring washers and the protective properties of flat washers. In special environments, consider material temperature resistance and corrosion resistance, or adopt alternative solutions such as lock nuts. Detailed selection strategies are outlined below: