1/4-20 Rivet Nut Tool Tip, Replacement Mandrel The riveting nut pole and the nut lead mouth are assembled together for convenience. Easy to use and helps prevent loss. Save money by replacing the nut rivet mandrel instead of purchasing a new riveter. Fits many standard nut riveters. Constructed from high strength steel. The tool brand offers a wide selection of rivet nut tools, rivet nuts, and replacement tips ???? A quick compatibility check with us before ordering saves you time and hassle later.