As building standards evolve and the demand for high-performance fastening solutions rises, black drywall screws have become indispensable in both commercial and residential drywall construction. This in-depth guide explores key specifications, advanced manufacturing technologies, real-world application insights, and a rigorous comparison with alternatives like 100mm plasterboard screws and 38mm plasterboard screws.
According to Global Drywall Fasteners Market Report 2023, the market for drywall screws is projected to grow at a CAGR of 7.8% from 2023 to 2028, driven by the expansion of urban infrastructure, energy-efficient buildings, safety regulations (e.g., ISO 9001, ANSI), and developments in anti-corrosive coatings.
| Parameter | Black Drywall Screws | 100mm Plasterboard Screws | 38mm Plasterboard Screws |
|---|---|---|---|
| Material | High-carbon Steel, Black Phosphate Coating | Stainless Steel, Zinc Coated | Carbon Steel, Electroplated |
| Thread Type | Coarse Thread | Fine Thread/Self-Tapping | Fine Thread |
| Common Length (mm) | 25/35/41/50/65/75/100 | 100 | 38 |
| Surface Treatment | Black Phosphate | Galvanized | Black Phosphate/Yellow Zinc |
| Corrosion Resistance | ISO 9227 Salt Spray > 48h | ISO 9227 > 36h | ISO 9227 > 24h |
| Tensile Strength | ≥850 MPa | 550~700 MPa | 500~650 MPa |
| Diameter | 3.5/3.9/4.2 | 4.2 | 3.5 |
- Raw Material: High-carbon steel wires (certified to ISO 9001 standards)
- Wire Drawing: Sizing of wire for uniform mechanical performance
- Cold Heading: Forging of screw head, ensuring Philips recess precision
- Thread Rolling: Formation of ultra-sharp coarse thread, vital for high holding power in gypsum board
- Phosphate Coating: Black phosphate ensures superior corrosion resistance
- Heat Treatment/Quality Testing: Hardness calibration, salt spray testing as per ISO 9227, ANSI/ASME B18.6.1
Product: Drywall Screws – Black Phosphate Coarse Thread
URL: View details
Standard Lengths: 25mm, 35mm, 38mm, 41mm, 50mm, 65mm, 75mm, 100mm
Diameter: 3.5mm, 3.9mm, 4.2mm
Head Type: Bugle head, Philips recess
Thread Type: Coarse thread
Material: High tensile carbon steel, black phosphate
Testing: Salt spray (48h+), hardness (Rockwell C 38-45), torque/load test
Certifications: ISO 9001, ANSI/ASME, RoHS
- Superior Corrosion Resistance: Black phosphate coating (ISO 9227 certified) increases service life and prevents rust even under 95%RH, 38°C accelerated salt spray for 48+ hours.
- High Pull-Out Strength: Resistance values up to 197 kgf (per ANSI/ASTM C1002 test), outperforming zinc-plated or generic fasteners in gypsum board anchoring.
- Precision Thread Rolling: Ultra-sharp coarse threads minimize installation torque and avoid wallboard cracks. Philips drive engineered for anti-cam-out performance.
- Uniform Hardness & Strength: Heat treatment conforms to Rockwell C38~45 and ISO 898-1 for tensile and shear strength.
- Wide Compatibility: Designed for all leading drywall systems—Stud Channel, C-Strut, Metal Stud, Timber.
- Environmental Sustainability: RoHS and REACH compliant; coating process nearly eliminates hexavalent chromium.
- Certified Manufacturer: Production audited by SGS, with ISO 9001:2015 and ANSI/ASME compliance.
- Commercial Buildings: Office partitions, public infrastructure, and shopping mall fit-outs.
- Residential Projects: Ceiling and wall framing, basement finishing, dry zone bathroom installations.
- Industrial Facilities: Metal stud wall linings, electrical and ventilation duct enclosures.
- Energy-Efficient Buildings: Installations in moisture-prone and high-humidity environments.
- Special Industries: Medical clean-rooms, laboratories (requiring low emissions & corrosion-free fasteners).
| Parameter | Drywall Screws - Black Phosphate | Market Generic Screws |
|---|---|---|
| Head Recess Type | Philips No. 2 (Precision cold-formed) | Generic Philips/Slotted |
| Material Certification | ISO 9001:2015 certified supplier | Not always certified |
| Salt Spray Resistance | >48 hours (ISO 9227) | 18~30 hours typical |
| Thread Consistency | Automated thread rolling, <±0.03mm pitch variation | Manual/Automated, up to ±0.13mm |
| Usage in Critical Applications | Widely in petrochemical, hospital, high humidity zones | Limited – rust issues in harsh environments |
| Traceability | Batch/Bin/Operator traceable | None or limited |
| OEM Customization | Available (custom lengths/labels) | Not available |
- Size Range: 3.5mm x 25mm to 4.2mm x 100mm, including 100mm plasterboard screws and 38mm plasterboard screws
- Private Labeling: Fully supported with compliant carton/label/barcode design.
- Special Coatings: Yellow zinc, white zinc, lubed coatings for specific humidity/installation needs.
- Packaging: Bulk, box, plastic bucket, small blister card (OEM on MOQ 100,000pcs).
- Support for Construction Bidding: Certificate package, test reports, third-party audits supplied on request.
- Delivery Lead-time: 15-25 working days typical, express for urgent site needs.
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Project: High-humidity public transit station wall & ceiling retrofits
Details: Over 600,000 black drywall screws installed across 3 phases in 2022-2023. Material passed random salt-spray testing (ISO 9227), zero installation failure.
Impact: Reduced installation time by 29% compared to prior solution. Post-project monitoring found less than 0.07% anchor pull-out or corrosion after 14 months.
Certification: All supplied fasteners traced, report documented for all milestones, per contractor QA protocol.
A1: They are made from high-carbon steel wire, cold-headed and surface-treated with black phosphate for enhanced corrosion resistance and load-bearing capacity.
A2: Black phosphate forms a crystalline conversion coating for superior anti-corrosive performance, critical in damp or alkaline drywall environments. Zinc plating, while shiny, is less protective in high-humidity or alkaline conditions.
A3: Per ASTM C1002, install at 3.8-4.5 Nm for optimal penetration without wallboard overdrive. Too low or high torque may cause under-fastening or cracking.
A4: ISO 9001 for manufacturing, ISO 9227 for salt spray/corrosion testing, ANSI/ASME B18.6.1 for dimension, and ASTM C1002 for fastening performance.
A5: In controlled humidity indoor environments, expected service life exceeds 15 years with no structural or visible corrosion degradation, contingent upon proper installation.
A6: Not recommended for permanently wet, outdoor environments unless additional anti-corrosive coatings (e.g., Dacromet) are applied. Standard black phosphate is suitable for indoor, high-humidity, or semi-exposed use.
A7: Yes, SXJ offers OEM (size, packaging, label), and full batch traceability on drywall screws per ISO/SGS protocols.
- Delivery Cycle: Standard production 15-25 working days; expedited shipping available.
- Warranty Commitment: All black drywall screws are covered by a 5-year anti-corrosion/strength warranty for in-spec installations.
- Certification: Material batch certificates, test reports, and MSDS available with every order.
- After-sales: 24/7 support team, technical assistance, installation troubleshooting.
- Global Service: International logistics partnerships; major supply projects in APAC, EU, Middle East.
- Contact: sales@sxj-staple.com
- ISO 9001:2015 – Quality management system
- SGS – Product audits and material testing
- ANSI/ASME B18.6.1 – US hardware dimension standard
- Case partners: Shanghai Metro, CRRC, China State Construction
In contemporary construction, **black drywall screws** remain the optimal solution for superior corrosion resistance, cost-effective installation, and reliable fastening, especially in critical zones such as public infrastructure, high-humidity, and energy-efficient projects.
Rely on ISO and ANSI-certified fasteners for consistent quality and compliance. For detailed technical consultations, custom OEM packaging, or third-party test reports, contact SXJ Fasteners.
SXJ Staple Company is a subsidiary of Baoding Yongwei Group, our company is a collection of production, sales of one-stop services.staple factory Yongwei Industrial Group has eight sub-plants, set production and manufacturing, sales in one, products including dozens of metal products, but also for customers at home and abroad to provide the greatest convenience.staple supplierThe factory was founded in 1990, started from a small workshop, a machine, two workers, gradually developed into a 1000 square meters workshop, 10 machines, 20 workers, until now 8 covers an area of 400mu, 800 machines, the scale of nearly a thousand workers, relying on the founder and production managers of the advanced concept and the spirit of not afraid of hardship, consistent development.staples types of paperThe factory always adheres to, honest management, quality-oriented, production safety production and management concept!staple manufacturers|screw suppliers|super blog