10.9 grade carbon steel black plated pan head cross slot captive screw (GB818 standard, round head anti-loosening half-thread thin rod) is a high-strength, anti-loosening precision fastener. Its core functions and key features are as follows.
1. High-strength load-bearing
10.9 grade carbon steel: tensile strength of 1000MPa, yield strength of 900MPa, suitable for high-stress environments.
Thin rod design: half-thread structure reduces weight while ensuring strength, suitable for scenes requiring precise positioning.
2. Anti-loosening function
Captive design: After the screw is tightened, long-term stability is ensured by a special structure.
Pan head + cross slot: increase the contact surface, provide higher torque with the cross slot, and enhance the anti-loosening effect.
3. Corrosion resistance and beauty
Black plating: black plating provides rust resistance, adapts to humid or mildly corrosive environments, and meets industrial aesthetic requirements.
4. Precision assembly adaptability
GB818 standard: meets national standard dimensions to ensure compatibility with standard hole positions.
Half-thread thin rod: The threadless section can be precisely positioned to avoid the thread from damaging the mating parts; the thin rod is suitable for installation on thin plates or in narrow spaces.
5. Convenient installation and maintenance
Cross slot: Strong versatility, easy to quickly disassemble and assemble with power tools or manual screwdrivers.
Round head design: Reduce the height of the protrusion to avoid scratches, suitable for scenes with high requirements for surface flatness
Typical application scenarios
Precision instruments: such as optical equipment and electronic chassis, which need to prevent loosening and are sensitive to space.
Automobile/aviation parts: Tighten wiring harnesses or brackets in high-vibration environments.
Industrial machinery: Modular structure with frequent maintenance, taking into account strength and ease of disassembly and assembly.
Selection Note
Anti-loosening level: If higher reliability is required, you can confirm whether it has passed the vibration test.
Coating details: The specific process of black coating affects corrosion resistance and needs to be selected according to the environment.
The core value of this screw lies in the balance of high strength, anti-loosening, and precise adaptation. It is suitable for industrial fields that require both reliability and installation accuracy.
