Abstract: A jumper cable having an end prepared for connecting to a coupling assembly. The prepared end includes an inner conductor, an outer conductor having a helical outer surface contour, and a dielectric core disposed between the inner and outer conductors. A weld washer: (i) threadably engages the helical outer surface contour of the outer conductor, (iii) receives a deformed edge of the outer conductor through an opening in the washer, and (iv) is penetration welded to deformed edge of the outer conductor. Operationally, the face of the weld washer augments the flow of electrical current to electrically ground the outer conductor to the coaxial cable connector.