Key Features
Built for Harsh Exposure Type 316 stainless steel gives this screw the corrosion resistance you want for coastal decks, wet environments, and other exterior wood jobs where ordinary fasteners do not hold up. Drives Cleaner The T25 6-lobe drive helps reduce cam-out, so you stay engaged in the screw head and get easier driving with less chewed-up recesses and longer bit life. Decking-Focused Thread This Simpson Strong-Tie wood screw uses coarse threads and a Type-17 point to start quickly and pull decking tight to framing without wasting time fighting the fastener.
Overview
The Simpson Strong-Tie T10250DTB Bugle-Head Wood Screw is a Type 316 stainless steel exterior wood screw built for fastening wood decking to wood framing. This is a wood screw designed for exterior wood-to-wood fastening. Model Number: T10250DTB. In this version, you get a #10 x 2-1/2 inch screw in a 2,000-count box, which makes sense for larger deck builds, waterfront work, and contractors who do not want to run short halfway through a board run.
What matters here is how the screw behaves during installation. The Type-17 point is made for fast starts, so the screw bites into decking quickly instead of skating around on the board surface. Coarse threads on roughly two-thirds of the shank help pull the deck board down tight to the framing, which is what you want when you are trying to get consistent board seating and a clean finished surface across the whole deck.
The drive design is another real selling point. This screw uses a T25 6-lobe recess, and that matters because it helps reduce cam-out compared with looser-fitting drive styles. In practical terms, that means the bit stays engaged better, the head is less likely to get stripped during repetitive fastening, and your driver bits tend to last longer. On a big decking job, that adds up in less frustration and fewer interruptions.
The bugle head is there for a reason too. It is shaped to countersink flush for a cleaner finished look on deck boards and other exterior wood surfaces. If appearance matters, and on visible decking it usually does, that head profile helps you avoid the rough, proud fastener look you get with the wrong screw style. It is a better fit for finish quality without turning this into a delicate fastener.
Material is a big part of why someone buys this exact screw instead of a cheaper option. T10250DTB is made from Type 316 stainless steel, which is the better call for severe corrosion environments and seaside applications. If the deck is near saltwater, a pool, or constant moisture, this material choice is not a minor spec. It is the reason the fastener holds up instead of becoming the weak link in the build.
This screw is intended for fastening all types of wood decking including cedar, redwood, preservative-treated wood, and engineered wood. It is not positioned as a general multi-material fastener. It is a purpose-built exterior decking screw, and that is exactly why it makes sense for pros and serious DIY builders who want the right screw for deck boards, rails, trim-adjacent deck work, and other above-ground outdoor wood applications.
From a jobsite practicality standpoint, this box size works well for production work. The package quantity is 2,000 screws, and the pack includes driver bits, so you can get started without hunting down the right bit first. If you are building one deck, resurfacing a larger platform, or stocking up for repeat exterior work, that quantity is a lot more convenient than juggling multiple small boxes.
Who should buy it? Contractors building decks in corrosive environments, remodelers doing premium exterior wood work, and homeowners who want to do the job once and not think about fastener failure later. If your project is inland and dry, you may not need Type 316. But if you are working near the coast or around constant moisture, this is the smarter screw to spend money on.
Made for Exterior Decking Work
This is the kind of screw that makes sense when the deck is exposed to weather, moisture, and daily use. It is built specifically for wood decking, not as a catch-all construction screw.
- Designed for wood-to-wood fastening in exterior applications
- Suitable for cedar, redwood, preservative-treated wood, and engineered wood decking
Starts Fast and Pulls Boards Tight
The thread and point design are what help this screw install efficiently. You get a quick starting tip and enough thread engagement to draw decking down instead of leaving gaps.
- Type-17 point helps the screw start quickly
- Coarse threads on about two-thirds of the shank pull material tightly to framing
Cleaner Drive, Cleaner Finish
The head and drive style work together here. You get a more secure bit fit during installation and a bugle head that seats flush for a neater visible surface.
- T25 6-lobe drive helps reduce driver-bit cam-out
- Bugle head is engineered for flush countersinking and a more concealed finish
What’s in the Box
- 2,000 Simpson Strong-Tie T10250DTB bugle-head wood screws
- (2) T25 6-lobe driver bits
Drill or impact driver not included.
Key Specifications
| Fastener Type | Wood screw |
|---|---|
| Screw Size | #10 |
| Length | 2-1/2 in. |
| Material | Type 316 stainless steel |
| Drive Type | T25 6-lobe |
| Head Type | Bugle head |
| Thread Type | Coarse threads |
| Point Type | Type-17 point |
| Head Diameter | 0.340 in. |
| Package Quantity | 2,000 |
Compatibility
Driver Bit Interface Uses a T25 6-lobe drive. Replacement bit model: BIT25T-2-R2. Material Pairing Designed for wood-to-wood fastening, especially exterior wood decking applications. Recommended Wood Types Suitable for cedar, redwood, preservative-treated wood, and engineered wood decking.
Built For
Deck Building Exterior Carpentry Remodeling General Contracting Coastal Applications Pressure-Treated Lumber Cedar and Redwood Decking DIY / Hobbyist
Pro Tip
When you are fastening near the end of a deck board, predrill first. It takes a little extra time, but it helps prevent splitting and keeps the finished edge looking clean.
Tool Nut’s Take
Tool Nut’s Take
Simpson Strong-Tie T10250DTB Bugle-Head Wood Screw for Coastal Deck Builds
If you are building an exterior deck where corrosion resistance actually matters, this is the right kind of screw to buy instead of trying to save a few bucks on the wrong fastener.
- Who it’s for: Deck builders, remodelers, and serious DIYers working on exterior wood-to-wood fastening, especially around salt air, pools, or constant moisture.
- Why it stands out: Type 316 stainless steel, a T25 6-lobe drive, and a Type-17 point give you the mix of corrosion resistance, easier driving, and solid pull-down you want in decking.
- Worth knowing: This is a 2,000-count box, so it is best suited to bigger projects or regular trade use, and predrilling near board ends is still the smart move.
Common Questions
- What is this screw made for? It is designed for exterior wood-to-wood fastening, especially wood decking applications.
- What drive bit does it use? It uses a T25 6-lobe drive.
- Is this a stainless steel screw? Yes. This model is made from Type 316 stainless steel.
- How many screws are in the box? This T10250DTB package contains 2,000 screws.
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