Qualfast: 12-OCSH-75 Blind Countersunk Rivet Nut Open Serrated Shank BZP (BX-100) Blind Countersunk Rivet Nut, Open Serrated Shank, Metric, Steel, BZP ( Bright Zinc Plated). MPN: 12-OCSH-75 Blind Countersunk Rivet Nut Open Serrated Shank BZP (BX-100) Attributes: Box Quantity: 1 Drill Size: 16mm Grip range: 4.5 - 7.5mm Length: 27.5mm Material: Steel Product Type: Blind Rivet Nut Countersunk Open Shank Rivet Nut Diameter: M12 Surface Treatment: Zinc Plated