Qualfast: 10-OCSH-45 Blind Countersunk Rivet Nut Open Serrated Shank BZP (BX-250) Blind Countersunk Rivet Nut, Open Serrated Shank, Metric, Steel, BZP ( Bright Zinc Plated). MPN: 10-OCSH-45 Blind Countersunk Rivet Nut Open Serrated Shank BZP (BX-250) Attributes: Box Quantity: 1 Drill Size: 12mm Grip range: 2.0 - 4.5mm Length: 21mm Material: Steel Product Type: Blind Rivet Nut Countersunk Open Shank Rivet Nut Diameter: M10 Surface Treatment: Zinc Plated