The 561-A2520 screws from Eagle Supply & Plastics are flat metal core screws sized 1/4-20. These screws are commonly used in a variety of projects, particularly where a low-profile fastener is needed. They are ideal for applications where space is limited, such as electronics enclosures, precision machinery, and furniture construction. One thing worth noting is that their flat design helps reduce the risk of damaging sensitive components in tight spaces. Engineers tend to reach for these when they need a secure hold without adding bulk. If you're working on anything that requires a precise fit and minimal profile, these screws are a solid choice. Their versatility and reliability make them a go-to option in many industries.