An adjustable swiveling passenger seat assembly is disclosed. The adjustable swiveling passenger seat assembly includes a set of base rails coupled to a floor. The adjustable swiveling passenger seat assembly further includes a plurality of pitch clevises coupled on a top surface of each of the set of base rails. The adjustable swiveling passenger seat assembly includes a swivel outer plate aligned in parallel relative to the floor. The swivel outer plate of the adjustable swiveling passenger seat assembly further includes a plurality of slots located on corners of the swivel outer plate and a plurality of spacers disposed within the plurality of slots.