Specifications: Material: brass Diameter: 8mm / 0.31" Pitch: 2mm Lead: 8mm / 0.31 " " Package includes: 1 x Nut [High Quality Material] This nut is made of high quality brass for durability and long life. life. [3D Printing] 3D printer part, suitable for 8mm diameter 3D printer.Advanced threaded rod 2mm T8 screw pitch. [ Anti-glare nut] Special anti-glare nut, high precision, DIY cost engraving machine, 3D printer preferred.Also if you can use it in CNC factory to do wood projects. ;[Applicable] This nut is highly recommended for someone who needs an anti-glare nut for their 3D printer or whatever.