The spin parameters A and Ann have been measured for np and pp elastic scattering at 6 GeV/c using a 12 GeV/c polarized deuteron beam and a polarized proton target at the Argonne ZGS. The recoil proton was measured by a conventional magnetic spectrometer, while the scattered neiitron/proton was detected in a brass-scintillator neutron converter/detector. Clean elastic signals were seen in both reactions. Our results on pp elastic scattering show that A and Ann are small and positive, in agreement with previous measurements. In np elastic scattering, we find that Ann -1% over the t-range .25<-t<.6 (GeV/c)2.