Our black coated large flange Phillips self-drilling Tek screws are available in 410 stainless steel (HV 400-500) or medium-carbon steel (Grade 8.8-10.9), with an eco-friendly black zinc or black oxide coating that provides corrosion resistance and a matte dark aesthetic. The large flange round head effectively distributes clamping stress to prevent sheet deformation, with anti-slip serrations underneath for vibration resistance. The Phillips recess drive is compatible with standard screwdrivers and power tools, delivering high torque transmission. The high-hardness 410 self-drilling point penetrates corrugated steel, light-gauge steel studs, and metal curtain walls directly – no pre-drilling required – completing drilling, tapping, and fastening in one operation. The anti-slip high-grip threads ensure secure fastening. Sizes M4.2-M6.3 (#8-#14), lengths 13-150mm custom. Ideal for dark-coloured steel roofing, black sheet metal enclosures, light steel stud partitions, outdoor black steel structures, and automotive modifications. Installation: drive directly with an electric drill or impact driver – the drill point creates the hole while the large flange seats firmly.
Black Coated 410 Stainless Steel Cross Recessed Large Flange Round Head Self-Drilling Tek Screws for Metal Sheet Mounting
Manufacturing Process
• Multi Station Cold Heading Technology
• Intelligent Heat Treatment System
• Micron-Level Thread Rolling Process
• Fully Automatic Optical Sorting
• Environmentally Friendly Surface Treatment Line
• Metallographic And Mechanical Joint Laboratory
Quality Control System
• Raw Material Source Locking
• Furnace Number Batch Full Traceability
• Third Party Material Certification
• Process Parameters Open And Transparent
• Salt Spray Test Real Time Monitoring
• International Standard Compliance Declaration
Flexible Customization Capability
• Customizable head/slot Shapes
• Extreme Application Of Special Materials
• Breakthroughs In Extra Large/Long Specifications
• Integrated Assembly Of Components
• Customizable Surface Treatment Colors
• Personalized Packaging And Labeling
Technical Service
• On-Site Failure Analysis
• Selection Calculation And BOM Optimization
• Installation Tool Selection Guidance
• Inventory Management (VMI) Trusteeship
• Free Sample Making And Testing
• International Standard Translation And Interpretation
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Dual-Material Options – 410 Stainless Steel or Carbon Steel for Hardness or Cost Efficiency
Available in 410 stainless steel (HV 400-500, high hardness, high driving torque, wear-resistant tip) and medium carbon steel (Grade 8.8-10.9, cost-optimized with reliable strength). 410 grade penetrates thick steel sheets and light-gauge studs without tip wear; carbon steel with black oxide coating offers corrosion resistance and cost-effectiveness. Dual-material range covers various budgets and working conditions – one screw, multiple applications.
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Eco-Friendly Black Zinc/Black Oxide Coating – Matte Finish, Corrosion Protection & Aesthetic Unity
Finished with eco-friendly black zinc or black oxide coating, delivering a uniform matte black finish that effectively resists moisture, salt spray, and industrial atmospheric corrosion. Strong adhesion with no chipping or peeling; color stays stable and rust-free outdoors. The dark appearance seamlessly blends with dark metal roofing, black sheet metal enclosures, solar mounting systems, and outdoor black steel structures – no secondary painting needed, combining aesthetics and corrosion protection in one.
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Large Flange Round Head Stress Distribution + Phillips High-Torque Drive – Flush Installation & Anti-Loosening
The large flange round head increases bearing area, effectively preventing depression, deformation, or cracking of thin panels or soft substrates during tightening; bottom anti-slip teeth bite into the substrate for vibration resistance. The Phillips drive fits standard screwdrivers and power tools, delivering high torque without cam-out, while the hardened self-drilling tip completes drilling, tapping, and fastening in one step. Anti-slip high-bite threads ensure long-term load retention without loosening – ideal for steel roofing, electrical cabinets, and light-gauge steel framing.
Factory Environment
Industrial Capabilities
• Factory Area: 11,405 square meters
• Certifications: ISO, IATF, CE, RoHS, JIS, ASTM
• Manufacturing : 70+ internationally advanced production lines
• Testing: 30+ sets of precision quality testing equipment
• Annual Output: Up to 50,000,000 tons
From Unprocessed Materials to Completed Items
Our factory's fully automated production lines for cold heading, precision thread rolling, controlled-atmosphere heat treatment, and environmentally friendly surface finishing enable closed-loop manufacturing from raw material to finished product. Thanks to inline optical sorting and a digital MES, every fastener meets stringent standards for strength, accuracy, and surface quality. You promise durable, effective, and environmentally responsible fastening.
Innovation Lab:
Expertise and collaboration drive us forward, constantly pursuing innovative solutions. Have a project? Let's get started.
"Pain Point Diagnosis" to "Customized Implementation" in the Whole Joint R&D Process
We provide more than just standard parts. From the beginning, our multicultural engineering team actively contributes to your project. We carefully consider the application environment and customize solutions in the lab, fully integrating technology and application, to guarantee that innovative ideas are quickly transformed into practical solutions that reduce overall lifetime costs.
Integrated Verification System: Using "Test Data" to Ensure Innovation
The creative process does not end at the drawing board. Through our internal technical center, we provide one-stop verification for anything from corrosion testing to prototype creation. Through extensive simulated working condition tests, we use empirical data to confirm the performance stability of tailored solutions. This significantly reduces project risks while also attaining truly reliable cost reduction and efficiency improvement.
