This screw basically holds everything together. It’s designed to clamp components of the wheel hub assembly – things like the hub itself, the bearing plate, or sometimes even brake components – tightly together. The hex head shape just lets you get a good, solid grip with a wrench or socket to tighten it properly. The washer underneath spreads out the clamping force, which is pretty important. This isn't some little trim piece; it’s a crucial structural component. It's part of what securely attaches the wheel hub to the vehicle, and that hub is obviously what the wheel itself mounts to. So, it's a direct link to keeping your wheel on the car and allowing it to rotate smoothly. It’s also a key part of the suspension system because it helps maintain proper wheel alignment and handling. If these screws fail or come loose, things get scary fast. You’ll notice if one starts to back out – you'd probably hear a clunking sound, and you’d certainly feel some vibration. But more importantly, a loose or broken screw can lead to excessive play in the wheel, which makes handling unpredictable and could even cause a wheel to come off while driving. It acts like a shield, keeping all those forces contained. They're high – stress parts, so using the correct grade and torque spec is vital. You can find these, and the screw itself, over at Fixparts Online if you need it. Don't mess around with these—they’re safety critical. Better than the rest: Hex Head Screw with Washer (MPN 31126760203) includes a 12-month warranty!

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• Get parts made specifically for your BMW, so they fit and work perfectly. • BMW parts are known for their high quality and durability, meaning they last longer. • Using genuine BMW parts helps maintain your vehicle’s value. • You can trust BMW parts to keep your car running smoothly and safely. BMW – trusted quality, available at FixParts Online!