#4-40 External Tooth Locknuts, Coarse, Steel, Zinc CR+3 Finish

# External Tooth Locknuts The #4-40 External Tooth Locknuts from MROSupply Fasteners are designed for secure fastening applications in various mechanical assemblies. Engineered from high-quality steel with a durable zinc CR+3 finish, these locknuts provide exceptional resistance to corrosion and wear, ensuring reliable performance in demanding environments. ## Key Features • **Material**: Constructed from high-strength steel for enhanced durability and load-bearing capacity. • **Finish**: Zinc CR+3 coating offers superior corrosion resistance, prolonging the life of the fastener. • **Size**: Designed for #4-40 threads, making them compatible with numerous standard applications. • **Locking Mechanism**: External tooth design provides superior grip and prevents loosening due to vibration. • **Weight**: Lightweight construction aids in reducing overall assembly weight without compromising strength. ## Applications • **Mechanical Assemblies**: Ideal for securing components in machinery, automotive applications, and electronic devices. • **Compatibility**: Fits standard #4-40 screws, making them versatile across various industries, including manufacturing and automotive. • **Environmental Suitability**: Excellent performance in both indoor and outdoor applications, thanks to their corrosion-resistant finish. ## Benefits • **Enhanced Security**: The external tooth design ensures reliable fastening under dynamic loads and vibrations. • **Durability**: High-quality materials and finishes reduce the need for frequent replacements, lowering maintenance costs. • **Versatile Use**: Suitable for a wide range of applications, providing flexibility for engineers and maintenance professionals. --- *Product information compiled with AI assistance for reference purposes.*