These Tee Nuts have a spring loaded ball that prevents unwanted movement of the nut in the slot. This allows for inserting nuts in the vertical position as they will not slide from gravity.
They are highly desirable to allow for adding tee nuts in a pre-built design.
These tee nuts work by being angled and inserted under the lip of the extrusion slot.
10 x Spring Loaded Tee nuts in a pack.