{"product_id":"simpson-strong-tie-deck-drive-dcu-composite-screw-10-x-2-3-4-in-t20-type-316-1750-pack-dcu234mb316","title":"Simpson Strong-Tie Deck-Drive DCU COMPOSITE Screw, #10 x 2-3\/4-in. T20, Type 316, 1750-Pack (DCU234MB316)","description":"\u003csection data-aplus\u003e\n\u003cdetails id=\"product-features\" class=\"acc\" open\u003e\n  \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"features\"\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003e316 Stainless Build\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eType 316 stainless steel gives this composite decking screw severe-level corrosion resistance, which matters when the deck is exposed to chlorides or harsh outdoor conditions.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003eCleaner Composite Fastening\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThe tri-lobe thread design, inverted upper threads, and cap head work together to reduce board damage, clear excess material, and help prevent mushrooming for a cleaner finished deck surface.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/drive-size.svg\" alt=\"drive-size\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003eBuilt for Volume\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThis 1,750-pack of Simpson Strong-Tie Deck-Drive DCU COMPOSITE Screw fasteners is set up for big deck jobs, not patch work. You get the quantity needed to keep a crew moving without constantly opening new boxes.\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-overview\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\" data-product-summary\u003e\n    \u003cp\u003eThe \u003cstrong\u003eSimpson Strong-Tie Deck-Drive DCU COMPOSITE Screw, #10 x 2-3\/4-in. T20, Type 316, 1750-Pack (DCU234MB316)\u003c\/strong\u003e is a composite decking screw built for fastening composite deck boards with a clean finished look and strong corrosion resistance. This is a \u003cstrong\u003ecomposite decking screw\u003c\/strong\u003e designed for \u003cstrong\u003efastening composite decking boards\u003c\/strong\u003e. Model Number: \u003cstrong\u003eDCU234MB316\u003c\/strong\u003e. If you are building a full deck and want a fastener that drives cleanly into composite material without beating up the board surface, this is the one this line is made for.\u003c\/p\u003e\n    \u003cp\u003eWhat matters here is not just the size, but how the screw behaves in the board. Simpson uses a tri-lobe thread design to reduce damage while driving, inverted upper threads to clear excess material, and a cap head to help prevent mushrooming. In real use, that means less material pushing up around the head and a cleaner-looking install across the whole deck surface. The Type-17 point is there for fast starts and easier penetration into composite decking, so you spend less time fighting the screw at the surface.\u003c\/p\u003e\n    \u003cp\u003eThis specific version is a \u003cstrong\u003e#10 x 2-3\/4 in.\u003c\/strong\u003e hand-drive screw with a \u003cstrong\u003eT20 6-lobe drive\u003c\/strong\u003e, \u003cstrong\u003ecap head\u003c\/strong\u003e, and \u003cstrong\u003eType 316 stainless steel\u003c\/strong\u003e construction. The 316 stainless build is the big story for buyers working near salt air, pool environments, coastal areas, or anywhere chlorides are part of the jobsite conditions. Simpson specifically positions this material for severe-level corrosion resistance, which makes it a better fit than basic coated fasteners when long-term exposure is a real concern.\u003c\/p\u003e\n    \u003cp\u003eThe head and thread design are geared toward finish quality as much as holding power. Composite decking can be unforgiving when the wrong screw lifts fibers, mushrooms the surface, or leaves a rough halo around the head. Here, the cap head keeps material from rising above the deck, while the inverted upper threads help clear it out as the screw seats. That combination is exactly why these are purpose-built deck screws rather than generic exterior screws with a fancy label.\u003c\/p\u003e\n    \u003cp\u003eFrom a jobsite practicality standpoint, this is also a volume-friendly pack. The box includes \u003cstrong\u003e1,750 screws\u003c\/strong\u003e, which Simpson notes is enough for approximately \u003cstrong\u003e500 sq. ft. of decking\u003c\/strong\u003e with framing at 16 in. on-center spacing. That makes this pack a better fit for full deck builds, production work, or contractors who want one consistent fastener across a large install. Tool Nut also lists \u003cstrong\u003e(2) driver bits included\u003c\/strong\u003e, with replacement bit part number \u003cstrong\u003eBIT20T-2-R2\u003c\/strong\u003e.\u003c\/p\u003e\n    \u003cp\u003eCompatibility is straightforward. The drive interface is \u003cstrong\u003eT20 6-lobe\u003c\/strong\u003e, and Simpson notes that the 2-3\/4 in. length is an approved fastener by \u003cstrong\u003eTrex\u003c\/strong\u003e for Trex composite decking. Simpson also states this length is available collated for the Quik Drive system, which matters if you are standardizing around the DCU platform and planning higher-volume fastening workflows, even though this SKU itself is listed as a hand-drive screw.\u003c\/p\u003e\n    \u003cp\u003eWho should buy this? Deck builders, remodelers, contractors, and serious DIYers installing composite or PVC decking in demanding outdoor environments. If you are after painted heads to blend with board color, this exact SKU is unpainted, so appearance-sensitive installs may push you toward one of the color-matched versions in the DCU family. But if corrosion resistance is the priority and you want a purpose-built composite deck fastener in contractor quantity, this pack makes a lot of sense.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eDrives Clean in Composite Decking\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"row\"\u003e\n      \u003cdiv class=\"img\"\u003e\n        \u003cimg src=\"https:\/\/ssttoolbox.widen.net\/content\/qflyvaobvs\/jpeg\/F_DCU_InstPho_Pho_Inst_DCU-CompositeScrew-DeckCorner_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Simpson Strong-Tie Deck-Drive DCU COMPOSITE Screw being driven into composite decking on a deck corner during installation over treated framing\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eThis is where a dedicated composite deck screw earns its keep. The screw is made to start fast, seat cleanly, and leave a smoother finished surface on composite boards.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eTri-lobe thread design reduces damage to the composite board while driving\u003c\/li\u003e\n          \u003cli\u003eCap head helps prevent mushrooming and material from rising above the deck surface\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-benefits-2\" class=\"acc flip\"\u003e\n  \u003csummary\u003e\u003ch2\u003eFast Starts, Less Fuss\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"row\"\u003e\n      \u003cdiv class=\"img\"\u003e\n        \u003cimg src=\"https:\/\/ssttoolbox.widen.net\/content\/bdqwefmvzg\/jpeg\/F_DCU_FeatClosPho_Pho_Inst_DCU-CompositeScrew-Tip-Cutaway_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Simpson Strong-Tie Deck-Drive DCU COMPOSITE Screw Type-17 point penetrating a composite deck board in close-up cutaway detail\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eThe point and thread design are set up to get the screw moving into composite material without the rough entry you often get from a general-purpose fastener.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eType-17 point penetrates composite decking with ease for fast starts\u003c\/li\u003e\n          \u003cli\u003eInverted upper threads clear excess material for a cleaner finish as the screw seats\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-benefits-3\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eMade for Harsh Outdoor Exposure\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"row\"\u003e\n      \u003cdiv class=\"img\"\u003e\n        \u003cimg src=\"https:\/\/ssttoolbox.widen.net\/content\/vplagum2xl\/jpeg\/F_DCU_ProdPho_Pho_Prod_DCU-CompositeScrew-Group_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Simpson Strong-Tie Deck-Drive DCU COMPOSITE Screw assortment showing unpainted and coated screw options for outdoor composite decking applications\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eThis specific DCU234MB316 version uses Type 316 stainless steel, which is the right move when the deck is going into a tougher environment and basic coating is not enough.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eType 316 stainless steel construction for severe-level corrosion resistance\u003c\/li\u003e\n          \u003cli\u003eUnpainted finish on this SKU\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-whats-included\" class=\"acc\" open\u003e\n  \u003csummary\u003e\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"tnincluded-wrapper\"\u003e\n      \u003cul\u003e\n        \u003cli\u003e(1,750) Simpson Strong-Tie DCU Composite Decking Screws, #10 x 2-3\/4 in.\u003c\/li\u003e\n        \u003cli\u003e(2) Driver bits\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"included-note\"\u003e\n      \u003cp\u003eReplacement bit part number: BIT20T-2-R2.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\n  \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003ctable class=\"aplusspecs\"\u003e\n      \u003ctr\u003e\n        \u003cth\u003eMaterial\u003c\/th\u003e\n        \u003ctd\u003eType 316 Stainless Steel\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eScrew Size\u003c\/th\u003e\n        \u003ctd\u003e#10\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eLength\u003c\/th\u003e\n        \u003ctd\u003e2-3\/4 in.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eHead Diameter\u003c\/th\u003e\n        \u003ctd\u003e0.230 in.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eDrive Type\u003c\/th\u003e\n        \u003ctd\u003eT20 6-Lobe\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eHead Type\u003c\/th\u003e\n        \u003ctd\u003eCap Head\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eThread Type\u003c\/th\u003e\n        \u003ctd\u003eTri-Lobe Threads\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003ePoint Type\u003c\/th\u003e\n        \u003ctd\u003eType-17 Point\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003ePackaging Quantity\u003c\/th\u003e\n        \u003ctd\u003e1,750\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eColor\u003c\/th\u003e\n        \u003ctd\u003eUnpainted \/ None\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"compat-list\"\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/drive-size.svg\" alt=\"drive-size\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eDrive Interface\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eUses a T20 6-lobe drive. Replacement bit part number is BIT20T-2-R2.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/material.svg\" alt=\"material\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eDecking Material\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eDesigned for fastening composite decking boards. Simpson also states the Type 316 stainless version is suited for all types of composite and PVC decking.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eApproved Use\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eThe 2-3\/4 in. length is listed by Simpson as an approved fastener for Trex composite decking.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/connectivity.svg\" alt=\"connectivity\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eSystem Note\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eThis SKU is a hand-drive screw. Simpson notes the 2-3\/4 in. length is also available collated for the Quik Drive system.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-applications-uses\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eBuilt For\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"tags\"\u003e\n      \u003cspan class=\"tag\"\u003eDeck Building\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eComposite Decking\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003ePVC Decking\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eOutdoor Construction\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eRemodeling\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eGeneral Contracting\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eDeck Installers\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eSerious DIY \/ Hobbyist\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"tip-row\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\n      \u003cp class=\"tip-text\"\u003eIf your job involves roof sleeper assemblies, do not assume this 2-3\/4 in. screw is the right length just because it is in the same DCU family. Simpson specifically calls for the 2 in. DCU screw for sleeper assemblies and says it should penetrate at least 1 in. into the wood sleeper without going through it.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n    \u003ch3\u003eSimpson Strong-Tie Deck-Drive DCU COMPOSITE Screw for serious deck work\u003c\/h3\u003e\n    \u003cp\u003eThis is the buy when you want a purpose-built composite deck screw with real corrosion resistance and enough quantity to handle a full build.\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Contractors, deck builders, and homeowners doing a substantial composite or PVC decking project, especially in coastal or chloride-heavy environments.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The Type 316 stainless body is the headline, but the real day-to-day benefit is how the tri-lobe threads, inverted upper threads, Type-17 point, and cap head work together for cleaner fastening in composite boards.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This exact DCU234MB316 pack is unpainted and hand-drive. If head color match matters, the DCU line has painted options, but if corrosion resistance is your top concern, this unpainted 316 version is a smart pick.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eIs this screw approved for Trex decking?\u003c\/strong\u003e Yes. Simpson states the 2-3\/4 in. length is an approved fastener for Trex composite decking.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat drive type does it use?\u003c\/strong\u003e It uses a T20 6-lobe drive.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eIs this painted to match deck boards?\u003c\/strong\u003e No. This DCU234MB316 version is unpainted.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eHow much decking will this box cover?\u003c\/strong\u003e Simpson notes that 1,750 screws install approximately 500 sq. ft. of decking with framing at 16 in. on-center spacing.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e","brand":"Simpson Strong-Tie","offers":[{"title":"Default Title","offer_id":52999303332134,"sku":"DCU234MB316","price":579.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/DCU234MB316_00707392986775_Product_Photo_01_924a9317-61cc-48eb-88cd-04445c426e68.jpg?v=1779135450","url":"https:\/\/www.toolnut.com\/products\/simpson-strong-tie-deck-drive-dcu-composite-screw-10-x-2-3-4-in-t20-type-316-1750-pack-dcu234mb316","provider":"Tool Nut","version":"1.0","type":"link"}