Release time：2020-01-16 18:44 Browse：
### 1. **Material & Core Construction** - **Outer Component**: Extra-thin aluminium hexagonal flange, offering lightweight properties and corrosion resistance for exposed surfaces. - **Core Material**: Carbon steel shank (likely low to medium carbon, e.g., 1022 or 1045) for structural strength, ensuring load-bearing capability despite the thin design. ### 2. **Design Features** - **Extra-Thin Profile**: Shank diameter and flange thickness are minimized (e.g., ≤5mm diameter) to fit tight, narrow spaces where standard bolts would be too bulky. - **Hexagonal Flange Head**: Integral hexagonal flange provides a wide bearing surface to distribute pressure, preventing damage to soft materials (e.g., plastic, thin metal) while enabling secure tightening with hex tools. - **Long Threads**: Threads extend most of the shank length (≥70% of total bolt length), ensuring deep engagement in thick or multi-layer assemblies for enhanced stability. ### 3. **Surface Treatments** - **White Zinc Plating**: Applied to the carbon steel shank via electroplating (5–8μm thickness), forming a bright, corrosion-resistant layer that withstands indoor humidity and light outdoor exposure (salt spray test ≥48 hours). - **Plain Finish**: Aluminium flange retains a natural, uncoated surface (or lightly anodized) for a clean appearance, balancing aesthetics with compatibility in low-corrosion environments. ### 4. **Performance & Advantages** - **Lightweight Strength**: Aluminium flange reduces overall weight by 30–40% compared to all-steel bolts, ideal for weight-sensitive applications (e.g., aerospace, electronics). - **Space Efficiency**: Extra-thin design fits into confined areas like machinery casings, furniture joints, or electronic enclosures. - **Dual Protection**: Zinc plating guards the steel core from rust, while aluminium resists oxidation, extending service life in mixed environments. ### 5. **Applications** - **Electronics**: Securing circuit boards, chassis, or thin metal panels in devices where space and weight are critical. - **Light Machinery**: Small appliances, 3D printers, or precision tools requiring low-profile fasteners with reliable grip. - **Furniture & Decor**: Assembling lightweight frames or visible components where the aluminium flange’s finish enhances aesthetics. ### 6. **Manufacturing & Compliance** - **Production**: Cold-headed carbon steel shank with rolled threads (for strength), paired with die-cast or machined aluminium flanges (bonded or threaded onto the shank). - **Tolerances**: Dimensional accuracy within ±0.05mm for diameter and thread pitch, complying with metric standards (e.g., ISO 15072 for flange bolts). ### 7. **Installation Notes** - Compatible with standard hex wrenches; avoid over-tightening to prevent stripping the thin aluminium flange. - Best used in dry or indoor environments; for high-moisture areas, opt for 316 stainless steel cores with enhanced zinc plating.
