FandWay 720Pcs Bolts and Nuts Set,M3 M4 M5 M6 Countersunk Machine Screws,DIN 7991 Allen Screws,Black Hex Bolts and Washers Set 10.9 Grade Alloy Steel Fully Threaded With 4 Allen Key.

• 🔩【High-Strength Material Guarantee】: Forged from Grade 10.9 high-carbon steel with hardness reaching HRC 32-39 and tensile strength ≥1040 MPa. Black oxide coating creates a dense protective layer,Designed for high-load mechanical assemblies, ensuring long-term resistance to deformation and stripped threads.(⚠️⚠️⚠️Attention:Please choose 304 stainless steel for outdoor humid environment）
• 🔩【Countersunk Head Design】: Sleek Hex Head Design with Enhanced Functionality Featuring a smooth, low-profile hex socket design, these screws sit flush after installation to prevent snagging or scratching. The precisely engineered socket depth ensures stable torque transmission, minimizing slippage and stripped threads.
• 🔩【Multiple Sizes for Versatile Use】: Includes M3 M4 M5 M6 screws with matching 304 stainless steel nuts, flat washers and custom hex keys for turnkey solutions.Eliminating extra purchases.these screws are compatible with precision instruments, electronics, furniture assembly, automotive parts, and more.
• 🔩【International Standard】:Every screw undergoes strict testing for hardness, thread accuracy, and surface finish. Compliant with DIN 7991 fastener standards, they guarantee precise sizing, secure threading, and reliable performance for professional-grade results.
• 🔩【Portable & Storage】: Each set comes with a compact storage case to securely hold screws and the hex key, preventing loss and enabling easy portability for efficient on-the-go repairs. Perfect for DIY enthusiasts and professionals seeking reliable fastening solutions across diverse projects.

●●●FandWay 720Pcs M3 M4 M5 M6 Hex Socket Countersunk Machine Screws, Nuts and Bolts 10.9 Grade Alloy Steel Flat Head Hex Socket Cap Screws Assortment Set With 4 Allen Keys and Storage Case. 【Features】 - This screw kit can be widely used in all kinds of precision machinery, instruments, electronic products, household appliances, clocks, lamps, toys, etc. - It is made of 10.9 Grade Alloy Steel, high-strength, rust, and corrosion resistant. - It comes in a separated girds storage box.easy to store and get these screw. 【Specifications】 - Product Name: Hex Socket Countersunk Machine Screws. - Color : Black. - Material: 10.9 Grade Alloy Steel. - Package: Durable plastic box. . 【Package Included】 - M3 * 8------------20 PCS - M3 * 12------------20 PCS - M3 * 16------------20 PCS - M3 * 20------------20 PCS - M3 Nuts------------90 PCS - M3 Washers------------90 PCS - M3 Hex Wrenchs------------1PCS - M4 * 8------------15 PCS - M4 * 12------------15 PCS - M4 * 16------------15 PCS - M4 * 20------------15 PCS - M4 Nuts------------70 PCS - M4 Washers------------70 PCS - M4 Hex Wrenchs------------1PCS -M5 * 8------------10 PCS - M5 * 12------------10 PCS - M5 * 16------------10 PCS - M5 * 20------------10 PCS - M5 Nuts------------45 PCS - M5 Washers------------45 PCS - M5 Hex Wrenchs------------1PCS - M6 * 8------------10 PCS - M6 * 12------------10 PCS - M6 * 16------------10 PCS - M6 * 20------------10 PCS - M6 Nuts------------45 PCS - M6 Washers------------45 PCS - M6 Hex Wrenchs------------1PCS - Total Quantity: 720Pcs+ 4 Wrench - Whenever you need us , please contact us by email or Q&A, we will give you a Professional Service and reply you within 24 hours. ⚠️Attention: Products contain small parts, keep away from children to prevent mistaken swallowing!