For in-line shaft applications FWW clutch couplings are comprised of an FSO clutch with a Form-Flex disc coupling to accommodate misalignment present in shaft-to-shaft in-line mounting. FWW clutch couplings are ideal for applications where the torque requirement is low in comparison to the shaft diameters. Both bore diameters in the coupling hubs are larger than the respective clutch bores. C/T sprags are available. Increased clutch-coupling speeds are possible with FSO clutches having steel labyrinth seals.