20 Packs 1/4-20 Threaded Steel Roll in T-Nut with Ball Spring, T Slot Accessories for Aluminum Extrusion Profile Rail

1.Premium Material: Roll-in spring T-Nut is made of 1045 steel with a bright zinc finish, durable for long lasting and rust-proof. | 2.Widely Use: This T-Nuts widely used for building industrial aluminum frame structures, 3D printers, CNC Routers, CNC laser cutters, Robotics Projects, 3D carvers, machine guards, workstations, etc. | 3.The ball spring allows you to hang this t slot aluminum extrusion accessory in a vertical position. | 4.Size and Type: Roll in Spring T Nuts measures .203 x .386 x .630 inches long with a 1/4-20 thread and comes with a ball spring. For use with 1010, 1020, 2020, and any other 1.0" based aluminum extrusions. | 5.Easy to Install: Sliding nut can only be inserted into T-slot from the end profile, Very easy to be slide into T-slot of aluminum profile. Back spring ball can be fixed its position which make installation very simple and reliable.