For quick building up the secure female threads by installing a Rivet Nut in the thin base metals and pipes with Weldless, Tapping-Free and One-Side Work to fasten with a Bolt or Screw.

With 4 Threaded Mandrels and 4 sizes of Rivet Nuts packed in Polybags: M3 x 0.7, M4 x 0.7, M5 x 0.8, M6 x 1.0.