Check the listing for details. 4Pcs M6x20mmx6mm Shoulder Knurled Thumb Nuts, Purple. Condition: New. Listed at 10.49 USD. What is this?The knurled thumb nuts are versatile and suitable for a variety of applications. They are commonly used in machinery, automotive, electronics, furniture assembly, and camera equipment, to name a few. They are also suitable for 3D printed parts, DIY projects, model making, and machining, providing a secure and stable connection.What will I get?Package Includes: 4 pcs knurled thumb nutsMaterial: 6061 Anodized Aluminium AlloyColor: PurpleSize: 20 x 6 mm/0.79 x 0.24 inch(Dia*H)Thread Size: M6*1Thread Thickness: 6 mm/0.24 inchIs there any advantages of the product?The flat knurled nut is made of anodized aluminum alloy with a smooth surface, is lightweight, and is not easy to rust, making it suitable for long-term use in various environments.