Product Description Material: stainless steel nylon Quantity: 170pcs Package Content: 170 * Stainless Steel Lock Nut 1. High Quality Materials: Made of 304 stainless steel and nylon, nylon inserts are threaded to prevent sagging, one of the best performing forms of corrosion resistant metal that lasts longer than other nuts on the market. 2. Sturdy And Durable: Sturdy polymer nuts are extremely resistant to rotation. Locknuts do not weaken or loosen under vibration or torque, reducing glow resistance. Guaranteed to stay intact and in a firm grip, making it virtually indestructible. 3. Nut sizes: M3 M4 M5 M6 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 the loss when necessary. 4. 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. 5. Convenient Storage: The nuts are stored in a storage box so that you can easily find them in the set and avoid loss if necessary.