Abstract: The present invention relates to an improved method for economically manufacturing lobular internally and externally threaded self-tapping inserts. The method is characterized by the novel application of a conventional roll forming apparatus of the type including two cylindrical driven thread forming dies in combination with a specially configured lobular elongated stock material, resulting in the provision of a multiplicity of longitudinally spaced-apart, externally threaded increments which may thereafter sequentially be drilled, tapped and severed from the stock material.