Shop the DEWALT CCN & C6 Fasteners - Specialty Fasteners, 0.120" shank / 0.102" step x 0.680". CCN Cordless Fasteners are a range of specialty fasteners for use in the Cordless Concrete Nailer (CCN) and Trak-It C6, for concrete, steel, and other specialty applications such as plywood or gypsum sheathing to steel studs, metal track to hard concrete, and attaching Stick-E accessories. ICC-ES ESR-4076.