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Help CenterWood Screws Yellow Zinc Plated for Hardwood Dacromet Coated Half Thread PZ Drive High Hardness Full Sizes Available Factory Direct
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Hefei SENOTECH New Materials Co., Ltd presents our premium Yellow Zinc Plated Dacromet Coated Wood Screws, engineered specifically for hardwood applications. As a trusted trading company with over US$1 Million annual export value and global market reach, we deliver factory-direct quality that combines exceptional corrosion resistance with high hardness. These half-thread screws feature a precise PZ drive for optimal torque transfer, ensuring secure fastening in demanding environments.
Our screws undergo a dual surface treatment process – yellow zinc plating followed by Dacromet coating – providing superior protection against rust and environmental factors while maintaining a professional appearance. The high hardness level (≥450 HV) guarantees reliable performance even in dense hardwoods like oak, maple, and walnut, reducing the risk of stripping or breakage during installation.
Key Features & Technical Advantages
- Dual Corrosion Protection: Yellow zinc + Dacromet coating offers up to 3x longer lifespan compared to standard zinc-plated screws in humid or outdoor conditions.
- Optimized Drive System: PZ (Pozidriv) recess ensures maximum engagement with screwdriver bits, reducing cam-out and increasing driving efficiency.
- Half-Thread Design: The partial thread allows the screw to pull the workpiece tightly while the smooth shank prevents over-tightening and wood splitting.
- High Hardness: Heat-treated to achieve core hardness ≥450 HV, ideal for dense hardwoods without pre-drilling (recommended for extreme cases).
- Full Size Availability: From #6 to #14 diameters, length options from 1/2” to 6”, custom sizes available upon request.
- Factory Direct Pricing: Eliminate middleman costs – we supply directly from our partner factories in Hefei, China.
| Parameter | Specification |
|---|---|
| Material | Carbon steel (C1022/C1010) or stainless steel (optional) |
| Surface Treatment | Yellow zinc plate + Dacromet coating (silver-gray top layer) |
| Drive Type | PZ (Pozidriv) – compatible with PH2, PH3 bits |
| Thread Type | Half thread (partial self-tapping) |
| Hardness | ≥450 HV (core hardness) |
| Available Sizes | Diameter: #6, #8, #10, #12, #14; Length: 12mm – 150mm |
| Application | Hardwood, softwood, MDF, plywood, furniture, decking |
Why Choose Hefei SENOTECH?
Established in 2020, Hefei SENOTECH has quickly grown to serve 12+ global markets including North America, Europe, Southeast Asia, and Oceania. Our annual export value of US$1-1.5 Million reflects our commitment to quality and customer satisfaction. We work closely with ISO-certified manufacturing partners to ensure consistent product standards, though we do not claim specific certifications unless explicitly stated in your order.
Every batch undergoes rigorous inspection: dimensional tolerance checks, hardness testing, salt spray corrosion testing (≥48 hours neutral salt spray), and drive test verification. We can provide test reports upon request.
Factory-direct model allows us to offer competitive pricing without compromising quality. Whether you need a standard stock size or custom specifications (special length, drive type, coating variants), we are ready to accommodate. With minimum order quantities as low as 5,000 pieces, we welcome both small trial orders and large-volume contracts.
Contact our sales team today for samples, technical datasheets, or a quotation. Experience the reliability of SENOTECH wood screws – built for hardwood, backed by global expertise.
Frequently Asked Questions
Q1: Can these screws be used outdoors or in high-humidity environments?
A: Yes, the Dacromet coating combined with yellow zinc plating provides excellent corrosion resistance, suitable for outdoor furniture, decking, and marine applications. However, for continuous underwater exposure, we recommend upgrading to stainless steel.
Q2: What is the difference between PZ and Phillips drive?
A: PZ (Pozidriv) has a cross shape with additional small ribs between the main slots, allowing better bit retention and less cam-out compared to Phillips. It is compatible with PZ and some PH bits, but for best results use a PZ driver.
Q3: Do I need to pre-drill for hardwood?
A: Due to the high hardness and sharp point of our screws, pre-drilling is often not necessary for most hardwoods. However, for very dense woods (e.g., ironwood) or precise applications, we recommend a pilot hole slightly smaller than the screw diameter.
Q4: What sizes are available for immediate shipment?
A: We maintain stock of popular sizes: #8 x 1-1/4", #8 x 2", #10 x 2-1/2", #10 x 3", #12 x 3-1/2". Custom sizes can be produced within 2-3 weeks depending on quantity.
Q5: Can you provide samples before bulk order?
A: Absolutely. We offer free samples (shipping cost covered by buyer) for evaluation. Please contact us with your requirements and we will arrange accordingly.
Q6: What is the packaging standard?
A: Standard packaging is 500 or 1000 pieces per box, with inner plastic bags. Larger quantities can be packed in bulk cartons. Custom branding or private labeling is available with minimum volume.
Q7: How do you ensure product quality?
A: Each batch is sampled and tested for dimensions, hardness, and salt spray resistance (≥48 hours). We can provide a Certificate of Analysis upon shipment. Our factory partners follow strict internal quality systems.
Q8: What is your typical delivery time?
A: For in-stock items, delivery takes 5-7 working days after payment. Custom orders require 15-25 working days depending on quantity and specifications.
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