This 80/20 T nut measures 13 mm x 7.19 mm x 22 mm long with a M8 thread and comes with a spring leaf. For use with 1515, 40-4040, 3030 and any other 1.5" or 40mm based aluminum extrusions. Made from 1045 steel with a bright zinc finish, this nut is self-aligning and the spring leaf allows you to hang this t slot aluminum extrusion accessory in a vertical position. This t-nut works with M8 bolts (not included) to attach joining plates, corner brackets, hinges, and other t track accessories to 80/20 aluminum extrusion. This high quality and sturdy M8 nut will make a great addition to your fasteners hardware toolbox. Perfect for any home improvement enthusiast or general DIY'er. This t-nut can be used in a wide variety of applications including 3d printers, cnc machine, building industrial aluminum frame structures, CNC laser cutters, Robotics Projects and more. The tall self-aligning roll-in T-nut with spring leaf is a fastening option that loads either from the profile ends or side, which is helpful for applications where the ends are inaccessible. The projection on the T-nut aligns it in the T-slot while the spring leaf holds the fastener in place, even when the profile is in a vertical position.