High quality: 304 stainless steel, high hardness, not easy to deform and rust, strong and durable and long service life. Anti-loosening design: the hex nut has good anti-rotation performance, which can Greatly reduce the backlash under vibration and torque. VariousSizes: M3, M4, M5, M6, M8, M10, M12 can meet different needs. The nylon nuts are placed in a storage box for easy search and avoid loss. Various uses: suitable for industrial manufacturing, machine mold, model making, etc. Quality Assurance: If there is any quality problem within 30 days from the date you received the product, please contact us in time to ensure a satisfactory response. Hexagonal Locknut, Strong and durable, Suitable for industrial manufacturing. Features 2.L hex nut can be locked by rotation, not easy to loosen, safe and firm, and good grip. SpecificationMaterial: 304 stainless steel Quantity: 190 Package contents: 50 x M3 Hex nut 40 x M4 Hex nut 30 x M5 Hex nut 25 x M6 Hex nut < br> 20 x M8 Hex Nut 15x M10