Check the listing for details. 4545 Series M6 t Slot Nuts Roll-in Spring Ball Loaded Elastic Nuts Silver 20pcs. Condition: New. Listed at 22.14 USD. Aluminum t-slot nuts are widely used in aluminum frame structures, 3D printers, CNC routers, CNC laser cutting machines, and robot projects in the construction industry and so on.Specification:Color: SilverMaterial: Nickel Plated Carbon SteelSlot width: 9.8 mm / 0.4 inchOverall size: 23 x 14.8 x 9 mm / 0.9 x 0.6 x 0.4 inch(L x W x H)Application: For 4545 Series Aluminum Frame StructuresPacking List: 20pcs x T Slot NutsAdvantage:Those T nuts are made of high hardness nickel plated carbon steel, with good rust resistance and better performance, durable for long time use.Instruction:Rotatable slot nut with balls can be directly inserted into the groove from the side of the profile during installation. The steel ball on the back can fix the nut at any position of the profile. Fit for aluminum profiles with specific slot.