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China Manufacturer Wood Screws for MDF and Plywood Double Countersunk Half Thread Ruspert Coated High Hardness No Snapping Full Sizes
Product Spotlights
Double countersunk head for flush fit in MDF/Plywood; half thread prevents tear-out; Ruspert coating offers 600h+ salt spray resistance; high hardness core (45–50 HRC) with no snapping; full size range 3.5–5.0mm stocked; custom sizes and packaging available. Reliable supplier with global export experience.
US$ 900 - 1050
MOQ: 1 Ton
Key Specifications
Get Latest Price
Material:
Other, Carbon Steel (optional high-grade alloy)
Coating:
Ruspert Coated (corrosion resistant)
Head Type:
Double Countersunk (flat/undercut)
Payment & Shipping
Payment Methods:
Port of Shipment:
Tianjin
Delivery Detail:
30 days
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Material
Other, Carbon Steel (optional high-grade alloy)
Coating
Ruspert Coated (corrosion resistant)
Head Type
Double Countersunk (flat/undercut)
Thread Type
Half Thread (partial thread design)
Hardness
High Hardness (core hardness ≥ 45 HRC)
Size Range
Full Sizes (e.g., 3.5×25mm to 5.0×80mm, customizable)
Application
For MDF, Plywood, Particleboard, OSB
Feature
No Snapping (high toughness)
Drive Type
Phillips/Pozidriv (optional)
Welcome to Hefei SENOTECH New Materials Co., Ltd – your reliable partner for premium fasteners. Since our establishment in 2020, we have been dedicated to supplying high-performance Double Countersunk Half Thread Wood Screws specially engineered for MDF and Plywood. Our screws feature a Ruspert coating for exceptional corrosion resistance and a high-hardness core that resists snapping during installation. With an annual export value of US$1–1.5 million and a global reach spanning North America, Europe, Southeast Asia, and beyond, we ensure consistent quality and full-size availability for demanding woodworking projects.
Key Features & Technical Specifications
- Double Countersunk Head – The unique undercut head profile allows the screw to sit flush or even below the surface, ideal for countersinking in thin MDF panels without splitting.
- Half Thread Design – The upper smooth shank reduces friction and prevents over-tightening in softer materials, while the lower sharp thread provides strong holding power in the base layer.
- Ruspert Coating – A multi-layer zinc-based coating with a top seal delivers excellent salt spray resistance (>600 hours), far exceeding standard electroplating. Suitable for interior and semi-exterior applications.
- High Hardness & No Snapping – Core hardness of 45–50 HRC combined with controlled toughness eliminates the risk of screw snapping even when driven into dense plywood or hardwood edges.
- Full Size Range – Available from 3.5×25mm to 5.0×80mm (and custom lengths upon request). All sizes are stocked for fast delivery.
- Sharp Tip & Aggressive Thread – Self-tapping design reduces pre-drilling requirements, saving installation time.
| Property | Value |
| Material | Carbon Steel (SAE 10B21 / 1022) |
| Coating | Ruspert – Salt spray ≥ 600 h |
| Head Type | Double Countersunk (flat/undercut) |
| Thread | Half thread, sharp self-tapping |
| Hardness (Core) | 45–50 HRC |
| Drive Type | Phillips #2 (Pozidriv optional) |
| Size Range | 3.5×25 – 5.0×80 mm (full sizes) |
| Applications | MDF, Plywood, Particleboard, OSB |
Why Choose SENOTECH Wood Screws?
- No-Snapping Reliability – Our proprietary heat treatment balances hardness and toughness. Even when driven close to edges, the screws bend rather than break, reducing waste and rework.
- Optimized for MDF & Plywood – The double countersunk head prevents mushrooming on MDF surfaces. The half thread minimizes tear-out in plywood face plies.
- Corrosion Resistance – Ruspert coating withstands moisture in kitchens, bathrooms, and outdoor furniture. No unsightly rust streaks.
- Full-Size Stock – We maintain inventory of 20+ popular dimensions. Custom lengths and bulk packaging available (boxes, cartons, or pallets).
- Consistent Quality – Every batch is tested for hardness, coating thickness, and thread geometry. Our QC standards meet international fastener norms.
Trusted by Global Buyers
As an experienced trading company based in Hefei, Anhui, SENOTECH has built a reputation for reliable supply since 2020. Our annual export value of US$1–1.5 million reflects steady demand from diverse markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Europe. We partner with reputable manufacturers to deliver screws that match the quality of leading brands at competitive prices. With flexible minimum order quantities and prompt shipping via sea or air, we are your ideal sourcing partner for wood screws, drywall screws, and other fasteners. Contact us today for samples, technical datasheets, or a customized quote.
Frequently Asked Questions
-
Q: Are these screws suitable for outdoor use?
A: The Ruspert coating provides good corrosion resistance for semi-exterior applications (e.g., covered decks, outdoor furniture). For full outdoor exposure, we recommend stainless steel variants (available upon request). -
Q: Can I use these screws without pre-drilling?
A: Yes, the sharp self-tapping tip and aggressive thread reduce the need for pre-drilling in most MDF and plywood thicknesses up to 18mm. For very dense hardwood or thick panels, a pilot hole is advised. -
Q: What is the difference between double countersunk and regular countersunk?
A: Double countersunk has an additional undercut below the head, allowing the screw to sit deeper and create a smoother surface. It is especially useful when fastening thin MDF or when a flush finish is required. -
Q: Do you provide custom sizes or packaging?
A: Absolutely. We offer custom lengths, diameters, and head/drive types. Packaging can be bulk boxes, shrink-wrapped packs, or pallets with your logo. MOQ for custom sizes is typically 50,000 pcs. -
Q: How do you ensure the screws do not snap?
A: Our screws undergo a controlled heat treatment that achieves a core hardness of 45–50 HRC while maintaining sufficient toughness. Each production lot is tested using a torque-to-failure test to confirm no snapping performance. -
Q: What is the typical salt spray test result for the Ruspert coating?
A: The Ruspert coating consistently passes 600+ hours of neutral salt spray testing (ASTM B117), significantly outperforming standard zinc plating. -
Q: Can I receive a sample before placing a bulk order?
A: Yes, we provide free samples for qualified buyers. Please contact our sales team with your required size and quantity, and we will arrange shipping at cost. -
Q: Which drive type is available?
A: Standard is Phillips #2. Pozidriv and Torx drives are optional upon request. Please specify when ordering.
Send Inquiry to This Supplier
1Yr
Business Type
Trading Company
Year Established
2020
Annual Export Value
US$1 Million - US$1.5 Million
Main Markets
North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia
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