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Stainless Steel Wood Screws

Never rust, even in rain and saltwater.

Built to last for decades outdoors.

Professional-grade strength with a worry-free guarantee.

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    304 /316 Grade stainless
    steel wood screws

    Never rust, even in rain and saltwater.

    Built to last for decades outdoors.

    Professional-grade strength with a worry-free guarantee.

    Get a Quick Qoute

    01

    Sinsun Stainless Steel Wood Screws | Corrosion-Resistant for Outdoor & Marine Projects

    Sinsun stainless steel wood screws offer permanent rust protection for decks, fences, and marine structures. The sharp point and strong threads ensure easy, secure fastening. Made from high-quality 304/316 stainless steel for lasting performance. Request technical specs and bulk pricing.

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    stainless wood screws Product Introduction

    Sinsun Stainless Steel Wood Screws are the definitive solution for projects where failure is not an option. With high-quality A2 (304) and A4 (316) stainless steel, our screws offer maximum durability in corrosive environments.In marine construction, coastal building, outdoor landscaping, and food processing facilities, where moisture, salt, and chemicals rapidly degrade standard screws, these screws are preferred. With self-tapping points and optimized drives, we combine this superior material with intelligent design for a long-lasting and easy-to-install fastener.

    Stainless Steel Pan Head Wood Screws

    Stainless Steel Pan Head Wood Screws

    The top of Sinsun's stainless steel pan head screws is rounded, and the bearing surface is flat. This design gives you a bigger area to attach metal brackets or hardware to wood, which makes the joint more stable. They come in grades A2-70 or A4-80 and have a tensile strength of at least 700 MPa. Their polished finish makes them look clean and professional, and it also protects them from rust.
    Black Stainless Steel Wood Screws

    Black Stainless Steel Wood Screws

    Our black stainless steel screws combine A2-70 corrosion resistance with a durable PVD (Physical Vapor Deposition) coating. This creates a uniform black finish that withstands over 500 hours in salt spray testing (ASTM B117) without fading or corrosion.These screws are ideal for architectural woodwork, dark hardwood fixtures, and outdoor projects that require high durability and visual stealth.
    Stainless Steel Round Head Wood Screws

    Stainless Steel Round Head Wood Screws

    Our round head screws feature a domed top that acts as a built-in washer and evenly distributes the clamping force. This prevents pull-through in softer materials. They are ideal for attaching hinges, nameplates, or thin sheet metal to wood because they are made of 304 or 316 stainless steel. The smooth, polished head also makes it less likely to snag in use.
    Stainless Steel Slotted Screws

    Stainless Steel Slotted Screws

    Offering a classic, minimalist look, our slotted stainless steel screws are machined with a precise, deep single slot. They are commonly specified in restoration work, fine furniture, and marine interiors for their traditional appearance. While requiring careful alignment with a standard screwdriver, they provide a clean, non-obtrusive finish and full A2/A4 grade corrosion resistance.
    Stainless Steel Flat Head Wood Screws

    Stainless Steel Flat Head Wood Screws

    The flat head screws are the industry standard for woodworking. With an 82-degree countersunk angle, they sit perfectly flush with or below the wood surface. The finish is smooth, uninterrupted, and this is essential for furniture, cabinetry, and decking. Our Type 17 self-tapping point allows for installation without pre-drilling in most softwoods.
    stainless steel countersunk wood screws

    Stainless Steel Countersunk Wood Screws

    Similar to flat head screws, our specialized countersunk screws are engineered for a perfect, seamless finish. They feature a sharp point and aggressive thread for quick driving and high withdrawal strength. The clean countersink is ideal for hardwood flooring installation, stair construction, and joinery where fastener visibility must be minimized. Available with Torx drive for maximum torque transfer.
    Stainless Steel Truss Head Wood Screws

    Stainless Steel Truss Head Wood Screws

    Also known as mushroom head screws, our truss head screws have a wide, low-profile dome. This provides the largest load-bearing surface among round-head types, making them exceptional for securing thin, brittle, or composite materials where a standard washer might embed. They effectively prevent pull-through in plywood, plastic, or laminate fixtures.
    Small Head Stainless Steel Screws

    Small Head Stainless Steel Screws

    The heads of our small head screws are smaller, which makes them less noticeable. They are made for jobs that need a lot of accuracy, like putting together small hardware, trim work, making instruments, or building models. Even though the head is smaller, they are made of full-strength A2 stainless steel, which means that the fastener won't break before the material around it does.
    01

    Product Key Selling Points

    • Ultimate Corrosion Resistance

      Choose between cost-effective A2-70 (304) stainless for general outdoor use or A4-80 (316) marine-grade stainless for maximum resistance to saltwater, chlorides, and harsh chemicals. They will not rust or stain, ensuring structural integrity and a clean appearance for decades.

    • High Strength & Reliability

      Despite common misconceptions, our stainless screws are heat-treated to achieve high tensile strengths (e.g., 700 MPa for A2-70, 800 MPa for A4-80), providing reliable load-bearing capacity for structural and heavy-duty applications.

    • Engineered for Performance

      Features like a sharp Type 17 or similar self-tapping tip allow for quick installation without pre-drilling, minimizing wood splitting and saving labor. Available with wafer heads for flush finishes in decking or hex washer heads for high-torque structural work.

    • Versatile & Application-Specific

      We offer a comprehensive range tailored for specific uses: timber decking screws with low-profile heads, structural timber screws for framing, landscaping screws for retaining walls, and long sleeper screws (250mm/300mm) for heavy timber construction.

    Technical Specifications Table Table

    Item Specification
    Product Type Stainless Steel Self-Tapping Wood Screw
    Material Grades A2-70 (304 Stainless Steel) / A4-80 (316 Stainless Steel)
    Standards Complies with DIN/ISO 3506 & relevant ASTM specifications
    Corrosion Resistance A2: Excellent resistance to atmospheric and freshwater corrosion.
    A4 (Marine Grade): Superior resistance to pitting and crevice corrosion from saltwater and chemicals.
    Point Type Sharp Self-Tapping Point (Type 17 style)
    Drive Type Torx T25/T30, Phillips #3, or Square #3 (High-torque options available)
    Head Types Wafer Head, Flat Head, Hex Washer Head, Round Head,torx head 
    Packaging Weather-resistant boxes, bulk packs, or custom packaging.

    Product Dimensions & Selection Guide

    Diameter (mm) Common Lengths (mm) Recommended Head Type Ideal Applications
    4.0mm 40, 50, 60 Flat Head / Wafer Head Furniture, light outdoor fixtures, trim work.
    4.5mm 50, 60, 70 Flat Head General outdoor carpentry, fencing, gazebos.
    5.0mm 60, 70, 80 Wafer Head / Hex Washer Decking boards, cladding, pergolas.
    5.5mm 70, 80, 100 Hex Washer Head Structural framing, post-to-beam connections.
    6.0mm 80, 100, 120 Hex Washer Head Heavy timber framing, landscaping ties.
    8.0mm 120, 150, 200, 250, 300 Hex Washer Head Heavy-duty timber construction, sleeper walls, marine docks.

    Sinsun Stainless Steel Wood Screws: Engineered for Demanding Applications

    For building on the ocean and along the coast

    For building on the ocean and along the coast

    For docks, boardwalks, sea walls, and homes on the coast, Sinsun's A4-316 stainless steel wood screws are a must-have. The better resistance they have to saltwater and spray prevents rust and corrosion, which weakens the structure. For permanent marine timber structures, they are the only safe choice because they are strong even in the worst conditions.

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    For high-end decking and outdoor furniture

    For high-end decking and outdoor furniture

    These screws are great for high-end outdoor projects like teak or hardwood furniture, pergolas, and decking. The material that does not corrode ensures there are no rust streaks, and options like black PVD-coated stainless steel give the fasteners a smooth, hidden look. This ensures that high-value outdoor investments will last a long time and look good for a long time.

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    For building on the ocean and along the coast

    For Landscaping & Ground Contact Applications

    We offer screws that can withstand constant contact with soil and moisture, making them perfect for retaining walls, raised garden beds, and timber borders in landscapes. A4 grade stainless steel does not rust when it comes into contact with fertilizers and organic acids. This makes it a strong, safe, and long-lasting way to fasten things, which performs better than coated carbon steel screws in wet environments.

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    For Landscaping & Ground Contact Applications

    For Interior High-Humidity & Hygienic Areas

    Perfect for bathrooms, kitchens, saunas, and basements, these screws prevent rust in damp indoor air. They are also specified in food processing areas, laboratories, and breweries due to their hygienic, easy-to-clean surface and resistance to chemical cleaning agents, ensuring compliance with strict health and safety standards.

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    Trusted by Professionals: Real Feedback on Sinsun Performance

    "We exclusively use Sinsun's 316 stainless steel wood screws for all our saltwater dock repairs. After two full seasons, there is zero sign of rust or corrosion, even at the splash zone. They're more expensive upfront, but they save us thousands in callbacks and replacement costs. The only screw we trust for marine-grade timber."

    Mark S., Dock Builder，Florida, USA

    "For our exposed glulam beam structures, aesthetics and strength are non-negotiable. Sinsun's stainless steel timber screws provide the clean look we need while delivering exceptional shear strength. They meet our engineering specs, and the low-profile heads create a seamless finish. A reliable partner for high-end architectural timber work."

    Elena K., Timber Frame Architect，British Columbia, Canada

    "For most of our treated pine fence and deck projects, Sinsun's coated steel wood screws offer the best value. The hot-dip galvanized coating holds up well, and the self-drilling tip lets my crew work fast. We've significantly reduced complaints about rust streaks compared to our old supplier. Great performance for the price."

    James L., Residential Fencing Contractor，Texas, USA

    "On our high-rise timber composite balcony projects, we switched to Sinsun's stainless steel construction screws. The consistency is key – no cam-out issues with the Torx drive, even when driving hundreds a day. They provide the structural peace of mind we need, and their corrosion resistance is vital in our coastal climate. They've cut our fastening time and worry."

    Site Foreman, Large Construction Firm，Queensland, Australia
    01020304

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    FAQ

    What makes Sinsun wood to steel screws different from standard wood screws?
    Unlike standard wood screws, our wood to steel screws feature a specially hardened tip and aggressive threading designed to penetrate and grip both materials. They can drill through thin gauge steel (attached to wood) and then tap into the timber, creating a solid, one-step fastener for applications like steel-framed wooden decks or metal bracket-to-wood connections.
    Can I use Sinsun stainless steel screws wood for permanent outdoor structures?
    Absolutely. Our stainless steel screws wood are the top choice for permanent outdoor projects. Made from A2 (304) or A4 (316) grade stainless steel, they offer superior resistance to rust and corrosion caused by rain, humidity, and pressure-treated wood chemicals, ensuring your deck, fence, or pergola lasts for decades without fastener failure.
    Do Sinsun wood to steel self tapping screws require a pilot hole?
    In most cases, no. The primary advantage of our wood to steel self tapping screws is their ability to drill their own pilot hole through the steel layer (typically up to 2mm thick) and then tap threads into the wood underneath, saving significant time and labor. A pilot hole may be recommended only for very hardwoods or thicker steel sections.
    Why choose Sinsun carbon steel wood screws over stainless steel for indoor projects?
    For dry, indoor applications like furniture, cabinetry, or framing, our carbon steel wood screws offer an excellent balance of high tensile strength and cost-effectiveness. They are heat-treated for hardness and come with protective zinc or other coatings to prevent rust, making them a durable and economical choice where exposure to moisture is minimal.
    Are Sinsun stainless steel cabinet screws designed to prevent staining on light-colored wood?
    Yes. Our stainless steel cabinet screws are ideal for fine woodworking and cabinetry. The non-corrosive stainless steel material prevents the iron oxide stains (black/rust marks) common with carbon steel screws, especially around the screw head. This ensures a clean, professional, and lasting appearance in high-visibility indoor furniture and cabinet installations.
    What is the best grade of Sinsun stainless timber screws for coastal areas?
    For coastal or high-salinity environments, we strongly recommend our A4 (Grade 316) stainless timber screws. They contain molybdenum, which provides exceptional resistance to saltwater-induced pitting and corrosion, far outperforming A2 (304) grade. This makes them mandatory for docks, seaside decks, and boardwalks to ensure longevity.
    What are typical applications for Sinsun 1 1/2 inch stainless steel wood screws?
    Our 1 1/2 inch stainless steel wood screws are a versatile length perfect for assembling 2x lumber (which is actually 1.5" thick). They are commonly used for decking (attaching deck boards to joists), constructing outdoor furniture frames, installing fence pickets to rails, and other general carpentry where a strong, corrosion-resistant hold in 1.5" thick material is needed.
    When should I use Sinsun 4 inch stainless steel wood screws?
    Use our 4 inch stainless steel wood screws for heavy-duty structural connections. Typical applications include securing 4x4 posts to deck beams or pergola frames, attaching large timber ledger boards to house framing, and in landscape construction (like retaining walls) where deep penetration and maximum withdrawal strength are critical for safety and stability.
    Are Sinsun 1 1/4 stainless steel wood screws suitable for attaching hardwood flooring?
    Yes, our 1 1/4 stainless steel wood screws are an excellent choice for securing tongue-and-groove hardwood or engineered flooring to wooden subfloors. Their length provides ample grip without penetrating too deeply, and the stainless steel construction prevents any potential rust stains from affecting the finished floor's appearance over time, especially with moisture-variable subfloors.
    What is the diameter/gauge of Sinsun #6 stainless steel wood screws, and what are they used for?
    Our #6 stainless steel wood screws have a shank diameter of approximately 3.5mm (0.138 inches). They are ideal for light to medium-duty fastening, such as assembling trim and molding, attaching thin plywood or paneling, building small craft projects, and any application where a smaller screw head is desirable to minimize wood splitting in delicate materials.
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