Durable Material: These rivet nuts are made of aluminum alloy, offering excellent corrosion, water, and rust resistance for long-lasting use. Various Sizes: Available in four sizes: M4, M5, M6, and M8, providing options for diverse needs and applications. Precision Design: The blind rivet nut features a precise internal thread design, ensuring high compatibility with screws, better fixing, reduced slippage, and more stable assembly. Easy Installation: The knurled design increases friction with the mating surface compared to standard nuts, allowing for easy installation in various materials. Widely Used: These rivet nuts are compatible with a variety of materials, including steel, plastic, fiberglass, and wood. They find extensive use in automobiles, furniture, crafts, and other industrial products. 1. Excellent corrosion resistance and toughness; not easily deformed and suitable for long-term use. 2. Includes 25 nuts of each of the four types, meeting your quantity and type requirements. 3. These crimp nuts are essential embedded parts used in automobiles, furniture, decorations, crafts, and other electrical and industrial products. Technical Data: Material: Alloy Color: Silver Size: M4: 119mm, M5: 1310mm, M6: 1512mm, M8: 1815mm Package Includes: 100 x Crimp Nuts Note: 1. Please allow slight dimension difference due to manual measurement.