Ball Screw Assembly comes with the ball screw, nut bracket, support unit(s), and housing(s). The nut bracket is loosely assembled onto the ball screw nut. For the ball screw assembly series, lead angle accuracy is C5, axial clearance is 0 max (except BNK0810 = 0 to 0.005 mm), and the ball screw nut has dust protection seals (except BNK0601/BNK0801/BNK0810). Support Unit (Floating End) and housing B are loosely assembled and packaged separately. Intermediate Flange & Coupling Kit are sold separately. Motor is not included. More detailed specifications are available in our digital catalog.