Enhance your fastening projects with this comprehensive 440-piece Hex Socket Flat Head Screw Bolts and Nuts Kit, crafted from durable 304 stainless steel for exceptional strength and superior corrosion resistance across various environments. Designed as an ideal combination, this kit includes a wide range of M3, M4, and M5 hex socket flat head screw bolts paired with matching hex nuts, making it perfect for industrial, construction, and mechanical applications. Key Features: · Premium 304 Stainless Steel Material: Offers robust strength and excellent corrosion resistance, ensuring long-lasting performance in diverse working conditions. · Extensive Kit Variety: Includes 440 pieces covering multiple sizes—M3, M4, and M5 hex socket flat head screw bolts in lengths 8mm, 12mm, 16mm, and 20mm, along with corresponding hex nuts, providing versatile options for different fastening needs. · Wide Application Range: Ideal for use in energy systems, electronics, electrical appliances, machinery, chemical industry, metallurgy, molds, hydraulics, and general construction and industrial fastening tasks. · Convenient Storage Box: All components are neatly organized in a durable plastic box for easy storage, quick access, and enhanced portability, keeping your fasteners secure and well-arranged. · Reliable Fixing Components: Designed for strong and stable fastening, suitable for both professional use and DIY projects requiring secure and precise assembly. Specifications: · Material: 304 Stainless Steel · Model: Flat Head Hex Socket · Total Weight: 506g · Included Sizes and Quantities:  - M3 x 8mm: 20 pcs  - M3 x 12mm: 20 pcs  - M3 x 16mm: 20 pcs  - M3 x 20mm: 20 pcs  - M3 Nuts: 80 pcs  - M4 x 8mm: 20 pcs  - M4 x 12mm: 20 pcs  - M4 x 16mm: 20 pcs  - M4 x 20mm: 20 pcs  - M4 Nuts: 80 pcs  - M5 x 8mm: 15 pcs  - M5 x 12mm: 15 pcs  - M5 x 16mm: 15 pcs  - M5 x 20mm: 15 pcs  - M5 Nuts: 60 pcs Package Includes: · 440 pcs M3, M4, M5 Hex Socket Flat Head Screw Bolts and Nuts Kit in Plastic Storage Box This Hex Socket Flat Head Screw Bolts and Nuts Kit is an essential addition to your toolkit, providing reliable, corrosion-resistant fastening components suitable for a wide range of industrial, mechanical, and construction applications. Count on this versatile set to deliver strength, durability, and convenience wherever secure fixing is needed.