Release time：2020-01-16 18:44 Browse：
### 1. **Strength Grades: Grade 8.8 & 10.9** - **Grade 8.8**: Made from heat-treated alloy steel, offering a minimum tensile strength of 800 MPa and yield strength of 640 MPa, suitable for medium-heavy load applications. - **Grade 10.9**: Higher-strength variant with a tensile strength of 1000 MPa and yield strength of 900 MPa, ideal for demanding scenarios requiring enhanced resistance to torque and dynamic stress. ### 2. **Half/Partial Thread Design** - Features a partially threaded shank: the lower section (typically 1/3 to 1/2 of total length) is threaded for secure engagement with nuts or tapped holes, while the upper "grip length" remains unthreaded. - This design balances clamping force (via threads) and shear resistance (via solid shank), preventing stress concentration in high-vibration applications like machinery or automotive assemblies. ### 3. **Hexagonal Flange Head with Integrated Washer** - **Hexagonal Flange Head**: Six-sided head with a built-in, flanged washer (wider than the head) that eliminates the need for a separate washer. The flange distributes clamping force evenly, protecting soft materials (e.g., plastic, thin metal) from damage. - **Hex Drive**: Compatible with standard hex wrenches/sockets for easy, high-torque installation, ensuring a secure fit in customized assemblies. ### 4. **Zinc Plated Finish** - Electroplated with a zinc layer (typically 5–25 μm thick) to provide corrosion resistance against moisture, humidity, and mild chemicals. - The plating also enhances surface smoothness, reducing friction during installation and extending service life in indoor/outdoor environments (e.g., electrical enclosures, industrial equipment). ### 5. **Captive Screw Function & Customization** - **Captive Design**: Engineered to stay attached to the parent component (e.g., panels, housings) when loosened, preventing loss in applications like machinery access panels or automotive trim. - **Customizable**: Available in tailored lengths, diameters, and flange sizes to fit specific assembly requirements, making it suitable for specialized new energy, automotive, or industrial equipment. ### 6. **Typical Applications** - Ideal for fastening components in automotive chassis, electrical cabinets, renewable energy equipment, and machinery where: - Controlled clamping force (half-thread) is needed. - Integrated washers simplify assembly. - Corrosion resistance (zinc plating) and high strength (Grades 8.8/10.9) are critical. - Captive functionality prevents part loss during maintenance.
