Top Quality Stainless Steel Rivet Nut Rivnut Insert Nutsert - Open end M4X0.7 Thread Small Flange, Knurled Body Material: Stainless Steel Body Diameter: 6.3mm Total Length: 10mm Application hole size: 6.4mm Grip Range 0.5~2.5mm Package: 20 pcs in a bag * PICTURE FOR REFERENCE ONLY.