[Application] - Commonly found on 3D printer beds, machine tools, cabinets, toolboxes, great for crafting projects and things that require quick adjustments. Great for items that need quick adjustments, use them to replace old ones. Package Includes: You'll get 30pcs knurled thumb nuts, including 5pcs M3, 5pcs M4, 5pcs M5, 5pcs M6, 5pcs M8, 5pcs M10. All are packed well in a transparent box for easy storage and carrying Product Specifications:Material: IronColor: Silver ToneThread Size: M6Pitch: 1mmTotal Size: 20mm x 13mm/ 0., 79 x 0., 51 (D*H)Package Included:30 Pcs x Knurled Thumb Nuts Sourcing Map M4 X 20mm Male Thread Knurled Clamp Knobs Grip Thumb Screw On Type Round Head 10 Pcs M6x1mm Nuts Knurled Thumb Nuts, Round Stepped Knobs Fasteners For 3D Printer Electronic Equipment Brass Tone Iron Fasteners [Easy to Use] - This nut with knurled surface that can be easily tightened, assembled and disassembled by hand without any tools. Application: These knurled thumb nuts are widely used in the machinery industry, furniture fastening, 3D printing parts, etc. Great for items that need quick adjustments. Use them to replace old ones, or just store them for your next install. Package List [Material] - Made of iron material that is high hardness, no rust and perfect corrosion resistance. [Knurled Thumb Nuts] - Thread Size: M6; Pitch: 1mm