Siemens 6GK5798-8MC00-0AC1 Automation Connection Component. Siemens 6GK5798-8MC00-0AC1 is the exact manufacturer order number for a automation connection component in the SCALANCE Industrial Ethernet portfolio. Siemens describes this exact reference as: RCoax threaded washer M6, threaded washer for RCoax Cable clip 1/2" for Use of M6 threaded bolts; 10 units. The verified manufacturer lifecycle record is PM300: Active Product.