There are many classifications of rivet nuts, such as flathead, small head, hexagonal, half-hexagonal rivet nuts, there are also through holes, blind holes, knurled and non-knurled rivet nuts. No matter what type of rivet nut, it is indispensable in our lives. The rivet nut can also solve the problem of "yellow water" after a long time in the air conditioner shell and can prevent problems such...