Threaded Inserts GUMIFA 10 Pcs M6 Rivet Nut, Zinc Plated Carbon Steel Flat Head Insert Flat Head Insert Nuts D)Package Content: 10 x Rivet Nuts, Material : 304 Stainless Steel Specification: Product Name: Rivet Nut Material: 304 Stainless Steel Grip Range: 0.5mm-3mm Thread Size: M6x1mm Drill Hole Size ( /-0.1): 9mm / 0.35 Total Size: 15x13mm / 0.59x0.51 (L*Max.D) Package Content: 10 x Rivet Nuts Thread Size: M6 x 1mm , Grip Range: 0., 5mm-3mm Insert Nut Uxcell 5/16-18 Multi-Grip Rivet Nuts Pre-Bulbed Shank Flat Head Threaded s Carbon Steel Color Zinc Plated 12 Pcs Threaded Rivet Nuts Package Content: 10 x Rivet Nuts Drill hole size: 9mm / 0., 35 Buy uxcell m6 304 stainless steel hex flat head rivet nut insert nutsert 20pcs at , get more rivet nuts in various size The added benefit of not only being a dependable fastener, they are ready to use with clean threads available for screw attachments. Blind Rivet Nuts also are used when an application has little or no access to the backside as they can be installed from the front side of the work piece. The material is too thin to machine the thread.