RJADK Modular Adapters NorComp RJADK Modular Adapters are supplied with pre-crimped contacts on conductors and available in three sizes including RJ-9 pos, RJ-15 pos, and RJ-25 pos. NorComp RJADK Modular Adapters feature a snap-together design that allows for cost-effective assembly, no crimp tools required, and 4-40 thumbscrews pre-installed in the backshell.