APPLY TO - A rivet nut is used for metal plates or non-metallic, wood and other plates in housing construction, and can also be used in the assembly of furniture, household thin iron cabinets, equipment shells, and other machine and light industrial products.SPECIFICATION:Material: Aluminum AlloyColor: Silver ToneHead Type: Flat HeadBody Design: KnurledThread Size: M3(Dia)Drill Hole Size: 3.9mm/0.15"(D)Length: 9mm/0.35(L)Head Outer Diameter: 7.2mm/0.28"(D)QUANTITY INCLUDED - 110pcs x Rivet NutsADVANTAGE - All use aluminum alloy material, high hardness, no-rust, wear-resistance, and perfect corrosion resistance. Replace the traditional welding nut, make up for the problem of metal sheet, thin tube welding and fusible.INSTALL - The rivet nut is designed to solve the problem that the material is too thin to process the thread.