1、The pitch of the guide screw refers to the distance from one thread to another. Perfect whether you want to achieve the accuracy of a 3D printer or the power of a scissors jack 2、The 8mm guide screw have 4 threads with a pitch of 2mm. Therefore each time the guide screw rotates, the linear stroke of the guide screw nut is 8mm 3、The 8mm diameter makes the screw compatible with many components, such as 8mm sleepers and 8mm thrust bearings 4、Using stainless steel material, possess corrosion resistance, heat resistance, high temperature and ultra‑low temperature resistance, good comprehensive mechanical properties and high strength 5、This excellent mechanism to convert rotation into linear motion can be used for accessories in the field of robotics 1 x CNC Screw Item Type: CNC ScrewModel: 5501-0804-0400Material: Stainless steelHelical Pitch: Approx. 8mm / 0.31inLine Number: 4Pitch: Approx. 2mm / 0.08inLength: Approx. 400mm / 15.7inPurpose: Accessories in the field of robotics, an excellent mechanism for converting rotation into linear motion