Losi LOS3818 Button Head Screws M3x40mm

This pack of button head screws sized M3 x 40mm is a genuine Losi hardware replacement built to factory specifications for RC applications requiring this longer fastener length. Each screw is machined from high-grade steel and finished with a protective coating that resists rust and corrosion, keeping the threads and hex drive functional through repeated use in demanding outdoor conditions. The rounded button head profile provides a compact, low-clearance finish while still handling strong clamping torque, making these screws well suited for securing longer stacks of components such as shock towers, chassis braces, or multi-layer mounting points. As a direct factory-spec replacement, these screws match original Losi hardware dimensions precisely, so they install without fitment issues on builds originally speced around this size. Having correctly sized replacement hardware on hand simplifies maintenance, letting you swap a single stripped or lost screw rather than sourcing an entire hardware set. Four screws are included in every package, providing enough hardware for a targeted repair or a small assembly project.