Qualfast: 3.5X6.5MM Drive Screw NI Plated (BX-500) Rivet Nut - Drive Screw, Metric, Ni - Nickel Plated. MPN: 3.5X6.5MM Drive Screw NI Plated (BX-500) Attributes: Box Quantity: 500 Length: 6.5mm Material: Steel Rivet Diameter: 3.5mm Surface Treatment: Nickel Plated