Release time：2020-01-16 18:44 Browse：
### 1. **Comprehensive Size Range: M3 to M6** Covering metric sizes M3, M4, M5, and M6, these screws cater to a broad spectrum of small-to-medium fastening tasks. Each size adheres to precise metric thread standards (e.g., M3 with 0.5mm pitch, M6 with 1.0mm pitch), ensuring compatibility with standard nuts, tapped holes, or pre-drilled components. The "long" specification extends beyond typical lengths—customizable from 20mm up to 150mm or more—making them ideal for securing thick materials, multi-layer assemblies, or components with deep recesses (e.g., wooden beams, metal brackets, or electrical enclosures). ### 2. **Diverse Head Designs for Specific Needs** - **Hex Head with Cross Recess**: Combines a six-sided hexagonal head (for high-torque tightening with wrenches or sockets) with a cross-recessed drive (Phillips or Pozidriv) for versatility. This dual-design allows use with both power tools (for rapid industrial assembly) and manual screwdrivers (for precision in tight spaces), making it perfect for machinery, automotive subassemblies, or structural brackets. - **Round Head**: Features a smooth, domed profile that sits flush or slightly raised on surfaces, prioritizing aesthetics and reducing snagging risks. Ideal for visible components like furniture, consumer electronics, or decorative metalwork where a clean, unobtrusive finish matters. ### 3. **Material Variants for Performance & Environment** - **Stainless Steel**: Crafted from grades like 304 or 316, offering excellent corrosion resistance, rust protection, and durability in harsh conditions. 304 stainless steel suits indoor/outdoor use (e.g., garden furniture, kitchen appliances), while 316 excels in marine, chemical, or high-moisture environments (coastal structures, pool equipment). - **Carbon Steel**: Made from high-quality carbon steel (e.g., 1022 or 1045 grade) for superior tensile strength and cost-effectiveness. Often zinc-plated or black-oxide coated to enhance rust resistance, it’s ideal for dry, indoor applications like machinery frames, wooden furniture, or electrical junction boxes where high clamping force is needed. ### 4. **Long Screw Benefits in Assembly** The extended shank length of these "long" screws provides critical advantages: - **Deep Penetration**: Secures thick materials (e.g., 50mm wooden planks, stacked metal sheets) or components with long gaps between surfaces, ensuring full thread engagement and stability. - **Reduced Fastener Count**: Eliminates the need for multiple shorter screws or spacers in multi-layer assemblies, streamlining installation and reducing part complexity. - **Enhanced Load Distribution**: The longer shank distributes stress evenly across the fastened joint, minimizing the risk of loosening in high-vibration environments (e.g., power tools, automotive engines). ### 5. **Customization & Application Versatility** Beyond standard sizes, these screws offer tailored options: - **Thread Types**: Fine or coarse threads (e.g., M5 x 0.8mm fine vs. M5 x 0.9mm coarse) to match material hardness (fine threads for soft materials like plastic; coarse for wood/metal). - **Coatings**: Zinc plating (for basic corrosion resistance), black oxide (for wear resistance), or passivation (for stainless steel) to suit environmental demands. - **End Styles**: Sharp points (for self-tapping in wood/plastic) or flat ends (for pre-tapped holes in metal) for specific substrates. **Key Applications**: Electronics (circuit board mounting), furniture (frame assembly), automotive (interior trim, under-hood components), construction (light structural fastening), and industrial machinery (panel securing). Their adaptability to M3-M6 sizes, varied heads, and material options makes them a go-to for both standard and specialized fastening needs.
