Hey there! If you're working on automotive projects or need some sturdy hardware for industrial applications, these Hillman extruded U-nuts are exactly what you need. They're the M8 metric size and come in a convenient 20-pack so you'll have plenty for your current job and future projects too. What's really cool about these U-nuts is how they combine the functions of both a lock washer and a regular nut - pretty handy right? The steel construction means they're built to last and can handle corrosion, so you don't have to worry about them giving out on you. Assembly is a breeze since they're self-retaining, which is awesome when you're working in tight spaces or just want to get the job done faster. Whether you're fixing up your car, working on machinery, or tackling some DIY projects around the workshop, these durable little guys won't let you down. They're low maintenance and designed to keep things secure for the long haul. No more struggling with regular nuts that just don't quite work right for certain applications - these U-nuts are specifically designed for those tricky spots where standard fasteners just won't cut it.