Internally threaded barrel-shaped fasteners integrally formed with a flat base, which has prong-type projections extending perpendicular from the base aside the barrel. T Nuts or also spelled Tee Nuts, have flanges on a thin surface of the nut which are offered in three or four “prongs.” These flanges act as hooks and are pulled into the material when the bolt is threaded into the nut. Tee nuts do require a pre-drilled hole. T nuts are designed to be used with a softer material such as wood or composites. Tee nuts are great for creating a flush finish on the nut side of wood.