... -Backlash nut design. The unique Patentedf CN-SCREW accom¬plishes high axial stiffness, zero back¬lash and the absolute minimum drag ... .063 WFTS _25160.250XC_4-25160.500XC_7-2514We produce , trapezoidal screws, high-speed screw, long screw, micro screw shape, spline shaft, worm ... . Trapezoidal screw,Ball screw shaft ,lead screw. We produce them. High precision stainless steel Trapezoidal screw