This heavy-duty ignition switch, part number 7N-4160/7N4160, is designed specifically for CAT engine applications across multiple machine models including 518, 528, 530B, 615, 621, 631D, 641B, and 657B. The switch features robust construction with a durable metal housing and blue connector interface for reliable electrical contact. Its industrial-grade design ensures consistent performance in demanding operating conditions typical of heavy equipment. The switch comes with mounting brackets and electrical terminals pre-installed for straightforward replacement installation. This component is essential for proper starting system operation in compatible CAT equipment. The switch's solid build quality and precise engineering make it suitable for the rigorous demands of construction and industrial applications. Perfect for maintenance teams and equipment operators looking to maintain optimal starting system functionality in their CAT machinery.