KGM-N-1205-RH-OO Thomson Ball Screw-Ball Nut Only

"Thomson KGM-N-1205-RH-OO Ball Nut Only, KGM Style, 12 mm X 5 mm, RH, 0.08 Max Backlash, Steel, 4.4 kN Dynamic Load; Nut Only, Screw Sold Separately; Integral wiper included as standard; Available in three preload classes (Type Z1, Z2, Z3) Z1 – light preload to 1-2% Z2 – no preload, clearance held to max indicated in table (standard unless specified) Z3 – no preload, clearance held to max .05mm"