... tons 3. Self-lock trapezoidal screws RN-Series Translating Screw Jack Features: ModelRN-0.5T, 1T, 2T, 3T, 5T ... -Locking Trapezoidal Screw, Worm Gear, Worm Shaft, Taper Roll Bearing, Housing, Grease Oil Sealing etc. MountingUpright, InvertedTop EndTop Plate ... Shaft, Coupling, Pillow Block Bearing, Counter, Bevel Gearbox, Swivel Plate etc.RN-Series Translating Screw Jack Material: Lifting Screwsteel C45 ( ...