{"product_id":"simpson-strong-tie-8-11-16-in-galvanized-predeflected-holdown-with-strong-drive-sds-screws-hdu2-sds2-5","title":"Simpson Strong-Tie 8-11\/16-in. Galvanized Predeflected Holdown with Strong-Drive SDS Screws (HDU2-SDS2.5)","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\u003eMade for Shearwalls\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThis holdown is built for shearwalls, braced-wall panels, and other lateral wood construction connections where uplift resistance matters. It gives you a dedicated tie point between the wood member and anchor bolt instead of relying on improvised hardware.\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\/accessories-included.svg\" alt=\"accessories-included\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003eSDS Screws Included\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThe Simpson Strong-Tie HDU2-SDS2.5 holdown comes with the specified Strong-Drive SDS Heavy-Duty Connector screws and a crescent washer. That saves guesswork and helps make sure the connection is installed with the fasteners it was designed around.\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\/accuracy.svg\" alt=\"accuracy\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003ePredeflected Seat\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThe predeflected seat is there to reduce deflection under load. In practical terms, that means a tighter, more predictable connection when the assembly is asked to do real structural work.\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 HDU2-SDS2.5 holdown\u003c\/strong\u003e is a galvanized steel holdown for wood construction. This is a \u003cstrong\u003eholdown\u003c\/strong\u003e designed for \u003cstrong\u003eshearwalls, braced-wall panels, and other lateral load connections\u003c\/strong\u003e. Model Number: \u003cstrong\u003eHDU2-SDS2.5\u003c\/strong\u003e. If you are tying a post or wood member down to resist uplift and overturning forces, this is the kind of connector you spec when the connection needs to be intentional, repeatable, and built around known fasteners.\u003c\/p\u003e\n    \u003cp\u003eWhat makes this version different from a basic holdown is that Simpson includes the Strong-Drive SDS Heavy-Duty Connector screws with the part. That matters because structural connectors only perform the way they are supposed to when the right fasteners are used. Instead of chasing down separate hardware or mixing in whatever is on the truck, you get the specified screw package and crescent washer right with the connector.\u003c\/p\u003e\n    \u003cp\u003eThe HDU series is designed for use in shearwalls and braced-wall panels, and the HDU2-SDS2.5 is one of the more compact models in that family. For this specific model, the body is made from 14-gauge steel, measures 3 inches wide, and has an overall height of 8-11\/16 inches. That size makes it practical for tighter wall framing layouts while still giving you a dedicated heavy-duty tie-down point at the base of the member.\u003c\/p\u003e\n    \u003cp\u003eOne of the more useful design details here is the predeflected seat. That feature is meant to eliminate deflection under load, which helps the connection engage more directly when the assembly is loaded. It is a small detail on paper, but in structural hardware, controlling movement at the connection is exactly the kind of thing that separates purpose-built hardware from a field workaround.\u003c\/p\u003e\n    \u003cp\u003eAnother practical advantage is that there are no stud bolts to countersink at openings. On the job, that can simplify layout and reduce the extra fiddling that comes with bolt-based hardware in tight framing areas. Simpson also notes that the HDU requires no additional washer, which keeps the installed hardware stack straightforward.\u003c\/p\u003e\n    \u003cp\u003eThe finish on this model is zinc galvanized G90. That gives it corrosion protection appropriate to the listed finish, and it is the standard finish for the non-HDG version of this connector. If your application calls for a different corrosion level, Simpson does offer additional corrosion-protection versions elsewhere in the HDU line, but this exact SKU is the zinc galvanized model.\u003c\/p\u003e\n    \u003cp\u003eInstallation is built around a 5\/8 inch anchor bolt and 1\/4 inch x 2-1\/2 inch Strong-Drive SDS Heavy-Duty Connector screws, with the screws included. Simpson also notes that these screws install best with a low-speed, high-torque drill using a 3\/8 inch hex-head driver. That is the kind of detail that helps on install day because it tells you what setup works best instead of leaving it to trial and error.\u003c\/p\u003e\n    \u003cp\u003eThis holdown makes the most sense for framers, builders, remodelers, and engineers working on code-driven wood framing connections where uplift resistance is part of the design. If you need a compact, specified wood-to-wood holdown with included structural screws and a predeflected seat, the HDU2-SDS2.5 is a straightforward choice. It is not general-purpose hardware. It is structural connection hardware meant to be installed as part of a designed load path.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eSee How the Connection Is Used\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\/95ywrzojwx\/jpeg\/A_RFB4X5-55-HDU-SET-3G_InstPho_RI_Instld_RetrofitBolt-ZincGrade55-Yellow-SET-3G-EpoxyAdhesive-Holdown_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"Simpson Strong-Tie HDU2-SDS2.5 holdown installed at the base of a wood stud wall on a concrete slab during structural wood framing work\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eThis is the real job the connector is built for: tying a wood member down at the base so uplift forces transfer into the anchor system and foundation. It is a structural connector meant to be part of the load path, not just a piece of bent metal.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eDesigned for shearwalls, braced-wall panels, and other lateral applications\u003c\/li\u003e\n          \u003cli\u003eUses a 5\/8 inch anchor bolt and included 1\/4 inch x 2-1\/2 inch SDS connector screws\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\" class=\"acc flip\"\u003e\n  \u003csummary\u003e\u003ch2\u003eCompact Size, Purpose-Built Layout\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\/nliv2yjltg\/jpeg\/C_HDU4_ProdPho_Pho_Prod_Holdown-RightView_C0.jpeg?position=c\u0026amp;color=ffffffff\u0026amp;u=cjmyin\" alt=\"galvanized holdown body showing side profile, screw holes, and anchor seat for wood framing connector installation\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eThe HDU2-SDS2.5 is sized to do structural work without taking over the whole framing bay. Its geometry gives you a dedicated anchor seat at the base and a screw pattern up the post or stud face where the connector can do its job.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eOverall height: 8-11\/16 in.\u003c\/li\u003e\n          \u003cli\u003eWidth: 3 in. and seat dimension B: 3-1\/4 in.\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) Simpson Strong-Tie HDU2-SDS2.5 holdown\u003c\/li\u003e\n        \u003cli\u003e(6) 1\/4 in. x 2-1\/2 in. Strong-Drive SDS Heavy-Duty Connector screws\u003c\/li\u003e\n        \u003cli\u003e(1) crescent washer\u003c\/li\u003e\n      \u003c\/ul\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\u003eType\u003c\/th\u003e\n        \u003ctd\u003eHoldown\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eMaterial\u003c\/th\u003e\n        \u003ctd\u003eSteel\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eGauge\u003c\/th\u003e\n        \u003ctd\u003e14 ga\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eFinish\u003c\/th\u003e\n        \u003ctd\u003eZinc Galvanized, G90\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eWidth (W)\u003c\/th\u003e\n        \u003ctd\u003e3 in.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eHeight (H)\u003c\/th\u003e\n        \u003ctd\u003e8-11\/16 in.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eSeat Dimension (B)\u003c\/th\u003e\n        \u003ctd\u003e3-1\/4 in.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eAnchor Bolt Size\u003c\/th\u003e\n        \u003ctd\u003e5\/8 in.\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\/specs.svg\" alt=\"specs\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eFastener System\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eDesigned to use 1\/4 in. x 2-1\/2 in. Strong-Drive SDS Heavy-Duty Connector screws. The required screws are included.\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\/size.svg\" alt=\"size\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eAnchor Interface\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eInstall with a 5\/8 in. anchor bolt.\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\/toolbox.svg\" alt=\"toolbox\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eDriver Setup\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eSDS connector screws install best with a low-speed, high-torque drill equipped with a 3\/8 in. hex-head driver.\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\"\u003eWood Framing\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eShearwalls\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eBraced-Wall Panels\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eHigh-Wind Construction\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eGeneral Contracting\u003c\/span\u003e\n      \u003cspan class=\"tag\"\u003eRemodeling\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\"\u003eUse a low-speed, high-torque drill with a 3\/8 inch hex-head driver for the included SDS screws. It gives you better control seating the connector screws than a fast driver, especially when you are trying to keep the connection tight and clean.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-at-a-glance\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eAt a Glance\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"stats-grid\"\u003e\n      \u003cdiv\u003e\n        \u003cdiv class=\"stat-value\"\u003e14 ga\u003c\/div\u003e\n        \u003cdiv class=\"stat-label\"\u003eSteel Body\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cdiv class=\"stat-value\"\u003e8-11\/16 in.\u003c\/div\u003e\n        \u003cdiv class=\"stat-label\"\u003eOverall Height\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cdiv class=\"stat-value\"\u003e6\u003c\/div\u003e\n        \u003cdiv class=\"stat-label\"\u003eIncluded SDS Screws\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cdiv class=\"stat-value\"\u003e5\/8 in.\u003c\/div\u003e\n        \u003cdiv class=\"stat-label\"\u003eAnchor Bolt Size\u003c\/div\u003e\n      \u003c\/div\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 HDU2-SDS2.5 Holdown for Clean, Specified Tie-Down Work\u003c\/h3\u003e\n    \u003cp\u003eThis is a no-nonsense structural connector for builders who want the right holdown, the right screws, and less messing around at install time.\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Framers, builders, and remodelers working on engineered wood framing, shearwalls, or braced-wall panels.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The included SDS connector screws, predeflected seat, and compact HDU2 size make it a practical option when you want a purpose-built uplift connection instead of piecing hardware together.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e This is structural hardware, so it needs to be installed with the specified fasteners and anchor bolt size. Great part, but only when it is used the way the connection was designed.\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\u003eWhat is this connector designed for?\u003c\/strong\u003e It is designed for use in shearwalls, braced-wall panels, and other lateral applications in wood construction.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDoes this holdown include the required screws?\u003c\/strong\u003e Yes. This model includes (6) 1\/4 in. x 2-1\/2 in. Strong-Drive SDS Heavy-Duty Connector screws and (1) crescent washer.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat anchor bolt size does it use?\u003c\/strong\u003e Simpson lists installation with a 5\/8 in. anchor bolt for this model.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat finish does this SKU have?\u003c\/strong\u003e The HDU2-SDS2.5 uses a zinc galvanized G90 finish.\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":52999303659814,"sku":"HDU2-SDS2.5","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/HDU2-SDS2.5_00707392650508_Product_Photo_02_58d8183e-2cc5-4b14-9441-0c444115ab16.jpg?v=1779135449","url":"https:\/\/www.toolnut.com\/products\/simpson-strong-tie-8-11-16-in-galvanized-predeflected-holdown-with-strong-drive-sds-screws-hdu2-sds2-5","provider":"Tool Nut","version":"1.0","type":"link"}