【Material】 This hex nut is made of high-quality carbon steel and nylon, making it strong, wear-resistant, and durable. It's a self-locking nut that's easy to use. 【Stability】The hexagonal nut has an internal thread that can secure the nut to prevent loosening, and the fastening effect is good. 【Finish】The surface is black galvanized, rustproof, and attractive. The machine tool is precision-manufactured using calculator control, with standard dimensions and clear, clean threads. 【Widely Used】Our self-locking nuts are very strong, suitable for construction of machinery, automobiles, motorcycles, model making, fences, furniture, etc. High-quality carbon steel and nylon hexagonal nut.The internal thread is self-locking, easy to use and provides a better fixing effect.Hexagonal nuts can be used in conjunction with bolts and screws to connect and secure parts.It is widely used in mechanical engineering, automobiles, motorcycles, model making, fencing, furniture, etc.The safety nut, also called a locking nut or self-locking nut, has a polyamide plastic clamping element in the internal thread.Thanks to the plastic deformation of the plastic part which occurs when tightening the nut, the automatic loosening of the screw fitting is prevented and other machine elements are also affected.or the work of the screw rod is not necessary.Important: Locking nuts are disposable. If such a connection is broken, the locking nut becomes unusable and must be replaced. Protection against accidental loosening is no longer possible.Self-locking nuts with plastic rings are not suitable for high operating temperatures. Contents:50 M5 hexagonal nuts.