Feature: 1. A variety of nuts of different specifications, all nuts are classified, easy to carry and use. 2. These rivet nuts are suitable for various metal plates, fastening pipes and other manufacturing industries. 3. Widely used in the assembly of automobiles, aviation, railways, refrigeration, elevators, switches, furniture, decorations and other electromechanical and light industrial products. 4. The exterior is coated with colored zinc, which is resistant to wear, oxidation and corrosion, and has a long service life. 5. Overall smoothly, flat without burrs, exquisite workmanship, strong and durable. Specification: Item Type: Rivet NutMaterial: Carbon steel Category: Color Zinc Flat Head Rivet Nuts Exterior Treatment: Color zinc plating. Specification M3 Approx. M4 Approx. M5 Approx. M6 Approx. Inner Diameter 3mm / 0.1in 4mm / 0.16in 5mm / 0.2in 6mm / 0.24in Outer diameter 4.9mm / 0.19in 5.9mm / 0.23in 6.9mm / 0.27in 8.9mm / 0.4in Inner Diameter of Head 5mm / 0.2in 6mm / 0.24in 7mm / 0.28in 9mm / 0.35in Head Outer Diameter 8mm / 0.31in 9mm / 0.35in 10mm / 0.39in 12mm / 0.47in Head Thickness 0.8mm / 0.03in 0.8mm / 0.03in 1mm / 0.04in 1.5mm / 0.06in Total Length 9mm / 0.35in 11mm / 0.43in 13mm / 0.5in 15mm / 0.59in Riveting Thickness 0.5 ~ 1.5mm / 0.02 ~ 0.06in 0.5 ~ 2.5mm / 0.02 ~ 0.1in 0.5 ~ 3mm / 0.02 ~ 0.12in 0.5 ~ 3.5mm / 0.02 ~ 0.14in Package List: 100 x Nut