Lead Screw for Stepper Motor 1. High Precision 2. Best Material and Production equipment 3. CE, RoHs and ISO 4. OEM accepted We produce high precision lead screw with the best material and advanced production equipment from Europe. Smooth® lead screws are available in standard diameters from 3.2mm to 23mm, with standard leads from 0.30mm to 92mm. Most screws are manufactured from 303 stainless ...