High-Quality Materials: Made of 304 stainless steel and nylon, the nylon inserts are threaded to prevent loosening, one of the highest-performance forms of corrosion-resistant metals, which lasts longer than other nuts on the market. Sturdy and Durable: The sturdy polymer nuts are extremely resistant to rotation. The lock nuts will not weaken or loosen under vibration or torque, reducing the resistance of the bolt. Guaranteed to remain intact and firmly gripped, making it virtually indestructible. Nut sizes: M3 M4 M5 M6 M10 M12 to meet different needs. Nylon nuts are stored in a storage box, with which you can easily find the series and avoid loss when necessary. Wide Range of Uses: Anti-lock nylon nut is a new type of anti-vibration anti-elastic parts used in, wardrobe, miner, mower, motor, textile machine, etc. Convenient Storage: The nuts are stored in a storage box so you can easily find them in the series and avoid loss when necessary. Specifications: Material: 304 stainless steel Quantity: 170 pieces Wide Range of Uses: Nylon nut Anti-lock is a new type of anti-vibration anti-elastic parts used in, wardrobe, miner, mower, motor, textile machine, etc. Hexagon nut lock nut lock nut set Lock nut set: 45 pieces of M3 35 pieces of M4 30 pieces of M5 30 pieces of M6 15 pieces of M8 10 pieces of M10 5 pieces of M12 Plastic box for storage - 1 PCS