Black Stainless Steel Self Tapping Screws
Weight Range ： 0.5g–500kg
NSS Test ： ≥ 480 hours no red rust
The black stainless steel self tapping screws are made of A2-70 stainless steel material, which has excellent corrosion resistance and mechanical strength. Its hardness is maintained within the HV 220-280 range, ensuring that the screws maintain excellent molding ability and durability during the tapping process. The self-tapping design does not require pre-drilling and can directly form a firm connection on various substrates.
These screws pass a salt spray test of no less than 480 hours, proving that they can still effectively resist rust in harsh environments. The surface is made of high-quality black oxidation, which not only gives the product a beautiful black appearance, but also provides an additional protective layer. The thickness of the coating is not less than 5 microns, ensuring that the product maintains stable corrosion resistance and appearance texture for a long time.
Parameters
JOYEAR began as a family business in 2008. We provide high-volume and efficient export solutions for industrial parts to global clients.
We specialize in custom metal products. Our team expertly crafts each item based on your design files. Send us digital prototypes or drafts. Our experienced staff will accurately produce physical parts that meet your needs.
|
Tensile Strength |
≥ 500 MPa (A2-70) |
|
Hardness |
HV 220-280 (A2-70) or HRC 35-45 (for 410 material) |
|
Coating Type |
TiN, TiCN or High-Quality Black Oxidation |
|
Coating Thickness |
≥ 5 μm (per ASTM B748) |
|
NSS Test |
≥ 480 hours no red rust |
Applications
Outdoor building and fence installation
Black stainless steel self-tapping screws securely install outdoor wooden platform, aluminum canopy and metal fence. Its self-tapping design allows installers to avoid pre-drilling, significantly improving construction efficiency.
The A2-70 stainless steel substrate combined with high-quality PVD coating can pass at least 480 hours of neutral salt spray test, effectively resist rainwater and ultraviolet corrosion, and its service life is much greater than that of ordinary galvanized screws.
Home decoration and electrical assembly
These screws reliably fix the metal keel of the TV background wall, suspend decorative paintings and assemble home appliance panels. The black surface gives the home environment an elegant and beautiful visual effect.
The screw core hardness reaches HV 220-280 (approximately HRC 23-29), providing excellent base material bite force. In the torque test, the M4 screw breaks the torque exceeding 4.5 N·m, ensuring the safe and stable suspension items.
Car interior and parts fixing
It securely secures the car interior panel, luggage rack and wiring harness bracket. The black screw head naturally blends into the dark interior of the car, maintaining visual unity.
410 martensitic stainless steel has been heat treated to reach HRC 35-45 hardness, effectively resisting vibration loosening, and can withstand temperature changes of 80°C in the car, maintaining stable performance for a long time.
Commercial display and advertising logo
This type of screw directly installs the mall display rack and advertising logo, and easily penetrates aluminum-plastic boards and other materials.
The M5 screws provide an average damage torque of no less than 9.0 N·m, generating strong clamping force, preventing the sign from loosening and falling off after long-term use, and ensuring the safety and reliability of the display device.
Production process
Wire Preparation ⇒ Cold Heading ⇒ Thread Rolling ⇒ Heat Treatment ⇒
Surface Treatment (Blackening) ⇒ Cleaning and Drying ⇒ Quality Inspection ⇒ Packaging and Shipping
Conclusion
As a reputable hardware manufacturer in China, JOYEAR propels industrial advancement with close to twenty years of proficiency. We supply precision cold-rolled steel products worldwide, utilizing robust engineering fundamentals. Our expertise integrates tailored fabrication with micron-scale production.We invite you to tour JOYEAR's cutting-edge manufacturing plants to observe our technological competencies and set new standards for industrial excellence.
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