To clarify, the strong force applies only to hadrons, which are particles composed of quarks. The two standard nuclear particles, neutrons and protons, are baryons, which are particles consisting of precisely 3 quarks (not 2, which are called mesons). So all nuclear particles are affected by the strong force. Indeed at such distances it is the dominant force.
There is another nuclear force, the Weak Force. This is (pretty obviously) weak, and has been more or less unfied with EM.