The Fiat FT5125394 is a genuine OEM pinion, an essential component for the drivetrain of various Fiat tractor models. This pinion is specifically designed for the Fiat 450, 480, 500, 540, 550, 600, and 640 series. It features 12 teeth and an overall length of 110 mm, ensuring precise power transmission and reliable operation within the transmission system. This part is also recognized as an equivalent to New Holland part number 5125394.