uxcell M8x18mm Rivet Nut Insert Nutsert Silver Tone 30pcs Thread Size: M8/0.3"(D); Product Name: Rivet Nut Material: 304 Stainless Steel; Weight: 175g Package Content: 30pcs x Rivet Nut; Main Color: Silver Tone Height: 18mm/0.7"; Type: Flat Flat Head Width: 10mm/0.4"(Inner.Width); Flat Head Outer Diameter: 15mm/0.6"