S.G. Bono , Jul 01, 2008; 09:01 p.m.
It's highly unlikely you'll be able to get them to work.
First, what SLR camera mount were these lenses made for? I know of Sakar mainly as a manufacturer of cheap aftermarket supplemental lenses for digital point-and shoot cameras. AFAIK, there was no Sakar-brand film SLR camera or lenses.
Second, the "flange-to-film" distance on Nikon is 46.50mm, meaning that most other well-known SLR cameras' lenses [Pentax, Canon, etc.] would have to somehow protrude *into* the body of a Nikon to achieve infinity focus.
Third, because of that specification, for Canon-EOS mount cameras ["flange to film" distance 44mm], there are multiple different adapters to use most other well-known 35mm camera brands' lenses, but not for Nikon.