The McCormick 6618743A1 washer is an authentic OEM component designed for various McCormick X4, X5, X6, X7, and X8 series agricultural tractors. This genuine washer provides essential support for bolted connections, distributing load and preventing loosening due to vibration. Manufactured to precise specifications with an inner diameter of 12.5 mm, an outer diameter of 24.0 mm, and a thickness of 2.0 mm, it ensures reliable and durable performance in demanding operational environments.