... WFTS _25160.250XC_4-25160.500XC_7-2514We produce , trapezoidal screws, high-speed screw, long screw, micro screw shape, spline shaft, ... made on the turn with the ball screw nut, all with the same precision ball screw, abrasive finishing the rolling groove ... be smooth motion performance. Trapezoidal screw,Ball screw shaft ,lead screw. We produce them. High precision stainless steel Trapezoidal screw