Our Lock Nuts Are Made from Aluminum Alloy, Which Provides Excellent Corrosion Resistance and Rust Prevention, Ensuring Long-lasting Durability. Surface Treatment Anodize Widely Used: Suitable for Assembly Machines, Machine Tools, and Accessories Computer Case , Aviation Model Toy Accessories,Toy Vehicles Side Panel, Hard Disk, Optical Drive, Network Card, Graphics Card, Sound Card, Diy Modification, Etc Vibrant Colors :Add Style and Uniqueness to Your Project with Our Colored Aluminum Screws. Available in a Variety of Vibrant Colors, They Are Perfect for Enhancing the Visual Appeal of Your Piece. Customer Service : We Take Pride in Providing Excellent Customer Support. If You Have Any Questions or Concerns, Our Friendly and Knowledgeable Team Is Always Ready to Assist You. ● Material: Aluminum ● Screw Size:M2 M2.5 M3 M4 M5 M6 M8 ● Characteristics 1. High Strength Heat Treatable Alloy. 2. Good Mechanical Performance 3. Good Usability. 4.Easy to Process and Good Wear Resistance. 5. Good Corrosion Resistance and Oxidation Resistance ● Tolerance Range: ±0.3mm