Package contains 25 pcs T-Nuts, please confirm the size before purchasing. M3 30 Series Drop In Nut - T-Slot Extrusion The center slide T-nut with thread offers excellent strength and reliability in its connections. Aluminium T-slot nut with UNC 1/4-20 thread - World of Clamping, $ 20.20 T-slot Track Fasteners Bueyfolt 1/4-20 Centered Thread Slide In Economy T-Nut For T Slot Track,Applicable To 10 Series Or 1.0'' Base Aluminum Extrusion(25-Pack Galvanized Iron Sliding Nuts Pack Of 25 They are an economical and practical choice for both the household and building industries. M8 30 Series Slide In Nut - T-Slot Extrusion The center slide T-nut is made of iron and coated with galvanized coating to ensure durability and prevent rust. Insert the sliding nut into the T-shaped groove from one end of the aluminum profile, and then connect the aluminum profile with other components.