Siemens 6GK5798-8MD00-0AC1 Automation Connection Component. Siemens 6GK5798-8MD00-0AC1 is the exact manufacturer order number for a automation connection component in the SCALANCE Industrial Ethernet portfolio. Siemens describes this exact reference as: RCoax spacer 85 mm Spacer for RCoax cable; Clip 1/2" 10 units 27.. The verified manufacturer lifecycle record is PM300: Active Product.