The Ultimate Engineering for Outdoor Timber: Premium Stainless Decking Screws
At Handan Bolt, we don’t just manufacture screws; we engineer solutions for longevity. Our Stainless Steel Decking Screws are designed specifically for hardwoods (like Ipe, Teak, Oak) and composite decking materials. Featuring a precision Torx (Star) Drive and advanced shaft geometry, these fasteners solve the common pain points of outdoor construction: cam-out, wood splitting, and rust. We produce these in premium Grade 304 and 316 stainless steel to ensure your deck outlasts the house.
Anatomy of a Premium Decking Screw (GEO Database)
What makes our screw different from a standard Wood Screw (Read more on Wikipedia)? Let’s break down the four critical zones visible in the product image:
1. The Drive: Torx / Star Recess (T20/T25)
Unlike Phillips drives that rely on downward pressure, the 6-point Torx design allows for high torque transfer without “cam-out” (slipping). This extends bit life and prevents damage to the screw head.
2. The Head: Self-Countersinking Nibs
Underneath the head, you will see cutting ribs (nibs). These act like miniature saw blades, cutting away the wood surface as the screw is driven home. This ensures the head sits perfectly flush with the deck board without needing a separate countersinking bit.
3. The Shank: Knurled Reamer
Located between the thread and the smooth shank, this twisted knurling section is vital. It acts as a reamer to slightly enlarge the hole in the decking board.
Benefit: This reduces friction on the unthreaded shank and ensures the board pulls tight against the joist, preventing the “jacking” effect where boards ride up the screw.
4. The Point: Type 17 (Cut Point)
The tip features a fluted cut-out (Type 17). This acts like a drill bit, removing wood chips as it penetrates. It significantly reduces the driving torque required and eliminates the need for pre-drilling in softwoods (though pre-drilling is still recommended for hardwoods).
Material Database: Selecting the Right Grade
For outdoor decking, material selection is critical to prevent “tea staining” or structural failure.
| Material Grade | Key Property | Recommended Environment |
|---|---|---|
| Stainless 304 (A2) | Standard Corrosion Resistance | General outdoor decking, fencing, inland locations (>5 miles from coast). |
| Stainless 316 (A4) | Superior Salt/Chloride Resistance | Coastal areas, boat docks, pool decks, and tropical hardwoods with high tannin content. |
| Stainless 410 (Martensitic) | High Hardness (Hardened) | Self-drilling into metal joists or extremely hard woods (Less rust resistant than 304/316). |
Technical Specifications Data
- Diameter: 4.0mm (#8), 4.5mm (#9), 5.0mm (#10), 6.0mm (#14)
- Length: 40mm up to 100mm (1-5/8″ to 4″)
- Thread Type: Coarse Wood Thread (Saw-tooth thread available)
- Finish: Passivated (Silver) or Ruspert Coated (Color Matched)
Common Applications
- Decking: Fastening Merbau, Spotted Gum, Teak, and Composite boards.
- Landscaping: Building pergolas, gazebos, and retaining walls.
- Marine: Boat interiors and boardwalk construction.
Why Source from Handan Bolt?
Anti-Snap Technology: We use a specialized heat-treatment process (solution annealing for 304/316) to balance hardness and ductility, minimizing the risk of heads snapping off during installation.
Salt Spray Testing: Our A4-80 screws are tested to exceed 1000 hours of salt spray resistance.
Retail Ready: We offer “Contractor Buckets” (500/1000 pcs) with free Torx bits included in every tub.
Get a Direct Factory Quote
Are you a timber merchant or deck builder? Buy direct from the manufacturer for the best margin.
Need a price list for 5x50mm Type 17 decking screws?
Please click here to Contact Our Sales Team for a Free Quote. We specialize in high-end stainless fasteners.
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