25Pcs Steel Multi Grip Rivet Nuts Pre Bulbed Shank Zinc-Plated Flat Head Threaded Insert Nut Construction Fasteners for Industrial (1/4-20)

I have a use for these that will allow them to be used both ways. I'll anchor something to a door and use either a sexbolt or these with a hurricane or sidewalk bolts. It works great and I don't need to worry about it z falling out.I like using these for so many different things.

Excellent quality

Very handy for places you need to access repeatedly.

3 out of 6 crush nuts failed from too much bolt to nut pressure. The Home Depo 1/4in x20 bolts snapped off because the nuts would not expand just twisted.. Applied lithium grease to threads then it worked much better without further failures.

These were perfect for repairing broken, rusted out threads in my sewage basin. First, I tried using the rivnuts, but those failed to hold in plastic. Rivnuts seem to not have enough surface grip to work in plastic even if it's thick. These, on the other hand were the perfect solution. The only down side is that the ruvnut tool shank was too short to use with these. They are longer than ruvnuts before they are locked in, so instead I made a custom tool using a bolt, some nuts, and washers. That did the trick. Once locked in, these will not move. Lots of surface area to grip, so even in plastic with strong torque on the bolts, these did not spin once locked in. Strongly recommend.

Good quality worked as it should.

I use these to repair plastic tables that have wood screws holding the legs on drilled out the plastic and installed then used machine screws to finish the job works grate

I used this product to install seats in john boat, i wanted tall seats to aide in casting. These were the threaded insert i needed to anchor them to the thin aluminum seat material. The larger top flange and the even larger bottom flange , create a strong threaded support for the seat base.