Features: Durability, provide excellent rustly resistance for long use. These T nuts ensure a precise fit, making installation quick in any aluminum Profiles extrusion slot. Suitable for professional mechanical engineers, enthusiasts, and industrial equipment maintenance personnel, this set offers versatility and reliability for various projects. Perfectly suited for mechanical assembly, furniture manufacturing, and electronic equipment mounting, these T nuts is essential components in diverse industrial applications. Enhances your project efficiency with this comprehensive kit, which includes 50pcs T nuts, screws, and washers, ensuring you have everything need for secure and stable installations. Specifications: Component:Aluminium Type:4-20/4-30/5-20/5-30/6-30/3-20/4-40/5-40/6-40/8-40 20:Approx.10mm/0.39inch 30:Apporx.15.5mm/0.61inch 40:Approx.19mm/0.75inch Package Includes: 50Pcs T Block Square Nut note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.