Features:1. 3D printer T8 600mm Stainless Steel Lead Screw + Screw nut + Mounted ball bearing+Shaft coupling+Motor.2. Screw mainly use for Stepping motor driving guide rail,machine Tool, and other equipment.3. Screw without processing, direct connected to bearing .4. T shape design,make of high quality stainless steel material.5. Easy to install and convenient to use.6. Fine producing and practical.7. Suitable for Industrial automation equipment, stepper motor rails;8. Fit for 3D printer; engraving machine; XYZ module; slider; lifts ect.Specifications:Lead screw:Material: stainless steelDiameter: 8mmPitch: 2mmLead: 4Total Length: 600mmScrew nut:Material: brassDiameter: 8mmPitch: 2mmLead: 4Mounted ball bearing:Material: zinc alloyBore diameter: 8 mmTotal length: 55mmHeight: 29mmShaft coupling:Material: aluminiumShaft: 6.35 x 8 mmLength: 25 mmDiameter: 20 mmHow to install:1. Pls put screw nut into the Lead screw2.Then the 2 Mounted ball bearing separately install at both ends of the Lead screw3. According to the size of you need to adjust the distance between the nut and Mounted ball bearing.4. Put shaft coupling into the Lead screw beside the Mounted ball bearingPackage Included:1x 600mm Lead screw1x Screw nut2x Mounted ball bearing1x Shaft coupling1x Motor