Fasteners called nutsertsalso called rivet nuts, threaded inserts, rivnuts, well nuts, or threaded insert nutsare used to make threaded connections in items composed of composite, metal, or plastic materials. The industries that employ nuts the most frequently are electronics, automobile, aerospace, and construction.When one side of the material is inaccessible or the material is too thin for tapping thread, a nutsertwhich is installed through a pre-drilled holeoffers a threaded hole for screws or bolts, providing a quick yet reliable fix.