02099 M4×4 Grub Screw provides a small threaded fastener used to securely hold components in place without a protruding head, helping maintain a clean and precise assembly. Made from durable metal to resist wear and maintain a tight grip under vibration and torque. Designed as a direct replacement hardware piece for compatible Redcat Racing models where M4×4 grub screws are specified. Helps prevent loosening of parts and supports reliable mechanical alignment. Useful for maintenance, repair, or rebuild work requiring precise fastening.