A positive locking push-on 3.5 mm (or other diameter, such as 2.4 mm) connector is provided by retaining an existing bayonet lug and latch style push-on latch mechanism and associated male and female outer conductor shells, but which is sized for 3.5 mm use, while providing SMA/APC-3.5 style male and female center conductor pins that are held in place within their respective outer conductor shells by RF beads that are part of a unitized transmission line subassembly. Alteration of certain axial dimensions of the outer conductor shells prevents the accidental mating of the 3.5 mm bayonet connector with a BNC connector of the opposite gender, and does so in a way that prevents damage to any of the center pins.