Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of black phosphate coarse thread drywall screw black plasterboard in China. Welcome to buy bulk high quality black phosphate coarse thread drywall screw black plasterboard made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Drywall screws are not priced by quantity alone. Weight per piece has a direct effect on cost, especially for large orders. A small difference in screw weight can change the total tonnage and the final price.
To quote accurately, please include your required weight per piece (g/pc) or an acceptable weight range when you send an inquiry. If you don't have a target weight yet, tell us the size, application, and order quantity, and we'll suggest a practical range.
Send us the details, drawing on my factory-floor experience, we can analyze your specific market conditions and store requirements to help you determine the most precise and appropriate pricing.e-no guesswork on weight.
Please specify:
01
- Diameter × length
- Head type (bugle head, countersunk, etc.)
02
- Thread type (fine or coarse)
- Coating (black phosphate, gray phosphate, zinc, etc.)
03
- Target weight per piece (g/pc)
- Order quantity
04
- Packaging (dimensions of the box/outer carton, package weight, and whether the logo style or color can be customized)
Product Features – Hardened, High-Strength, Coarse Thread
Engineered for demanding wood fastening applications, this screw features an aggressively pitched coarse thread that delivers exceptional grip and rapid insertion.
Manufactured from high-grade steel, each screw undergoes a specialized quenching and tempering process that hardens the core while maintaining necessary ductility, effectively eliminating the risk of brittle fracture under load.
Manufacturability&Quality Inspection
With mature production planning, we handle both regular and peak volumes without stretching lead times. Finished goods move into a well-organized warehouse with clear stock records and standard handling, which keeps packing, labeling, and dispatch accurate. That means your order is produced on schedule, stored properly, and shipped without surprises.
Throughout manufacturing, in-line statistical process control monitors critical dimensions-thread outer diameter, pitch consistency, and tip geometry-to ensure uniformity. Post-production, each batch undergoes comprehensive quality inspection, including hardness testing, salt spray corrosion resistance verification, and destructive torque testing. Only screws meeting or exceeding international fastener standards are approved for packaging.
Custom Packaging – Carton + Master Carton
We provide complete packaging flexibility to align with your branding and logistics requirements. Inner cartons can be customized with your logo, product specifications, and design elements, while outer master cartons are constructed from heavy-duty corrugated board to withstand long-distance transit. Packaging quantities, labeling formats, and carton dimensions are all tailored to your specific order requirements, ensuring efficient handling and shelf-ready presentation upon arrival.
Custom Packaging&Private Label Available
Choose from bulk cartons, poly bags with branded labels, or retail-ready packaging. Minimum order quantities can be adjusted to support both small contractors and large-scale procurement needs.
We offer custom box/bags printing and labeling services to help you build your own product line.
FAQ
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