The Pololu #4-40, 1 1/4" Length, Phillips Machine Screw (25-pack) is a high-quality and durable fastening solution. These pan-head screws are 31.75mm long, made from steel, and feature a zinc-plated finish for added durability and resistance to corrosion. Each pack contains 25 screws, offering a convenient solution for a variety of projects. The Pololu machine screws are perfect for a wide range of applications. Whether you're assembling a robotics project, repairing electronic devices, or working on a DIY task, these screws provide a reliable and secure connection. The zinc-plated finish not only enhances the screw's durability but also gives it a clean, professional look. One of the main benefits of the Pololu machine screws is their high-quality construction. Made from steel, these screws are designed to withstand considerable force and pressure, making them ideal for use in demanding environments. The pan-head design also allows for easy installation using a Phillips screwdriver. Unique to the Pololu machine screws is their versatile #4-40 size. This makes them suitable for a wide range of applications, from attaching small components to assembling large structures. With a length of 31.75mm, they are long enough to secure most parts but not so long that they become cumbersome to use. With the Pololu machine screws, you get a combination of quality, durability, and versatility. They are a great addition to any toolkit, making your projects easier and more efficient.