"Durable material: aluminum alloy rivet nuts, with good corrosion resistance, water resistance and rust resistance, and can be used for a long time.Various Sizes: We have four sizes of M4, M5, M6, M8, so you have different choices in different situations and different needs.Precision Design: The Crimp Nut blind has a precise thread design inside, so it is very compatible with the screw, the fixing effect is better, it is not easy to fall off, and the assembly effect of the article is no longer stable.Easy to install: Round thread rivets have a knurled shape that increases friction with the contact surface compared to ordinary nuts, and they can be easily installed in many different materials.Widely Used: Rivet nuts can be used in a variety of materials such as steel, plastic, fiberglass and wood. They can also be widely used in automobiles, furniture, products handicrafts and other industrial products. 1. The rivet nut has excellent corrosion resistance and toughness, is not easy to deform, and can be used for a long time. 2.There are 25 nuts for each of four types, which can meet your quantity and type requirements. 3. Crimp nuts are important embedded parts that can be 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 contains: 100 crimp nut Note: 1.Please allow some difference due to manual measurement. "