{"product_id":"simpson-strong-drive-sdhr-combo-head-screw-12-mm-x-100-mm-black-e-coat","title":"Simpson Strong-Drive SDHR COMBO-HEAD Screw - 12 mm x 100 mm, Black E-Coat","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDHR COMBO-HEAD Screw - 12 mm x 100 mm, Black E-Coat\u003c\/strong\u003e by Simpson Strong-Tie is a heavy-duty structural fastener engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood applications. With a robust combination head that accepts either a T40 6-lobe driver bit or a 17 mm hex-head driver bit, this partially-threaded screw delivers reliable connection strength when joining steel plate or angle connectors to wood. The black e-coat electrocoating finish offers corrosion resistance in interior dry-service environments, making this screw a dependable choice for engineered wood connections, factory-built construction, and steel-to-wood structural assemblies.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlack e-coat electrocoating finish - provides a construction-durable, nonmetallic, and friction-reducing coating for corrosion resistance in interior dry-service conditions, helping connections last in demanding structural environments\u003c\/li\u003e\n\u003cli\u003eOptimized hardness profile - helps mitigate field embrittlement issues and is compliant with CSA O86:24 hydrogen embrittlement requirements, giving builders confidence in structural performance and code compliance\u003c\/li\u003e\n\u003cli\u003eCombination head design (T40 6-lobe or 17 mm hex-head) - allows flexibility on the jobsite by letting installers drive with the bit they have on hand, reducing downtime and tool changes\u003c\/li\u003e\n\u003cli\u003eHex head with deep T40, 6-lobe recess - provides a secure, slip-resistant drive that reduces cam-out and keeps the fastener under control during installation\u003c\/li\u003e\n\u003cli\u003eType-17 point - ensures fast starts, reduces installation torque, and eliminates the need for predrilling in most applications, speeding up assembly in CLT and mass timber projects\u003c\/li\u003e\n\u003cli\u003eHeavy-duty shank with robust knurl - reduces installation torque during driving, lowering strain on the tool and the installer over long fastening sessions\u003c\/li\u003e\n\u003cli\u003eDesigned for use with steel side plates - makes this screw an ideal choice for steel plate or angle connector attachments to engineered wood members\u003c\/li\u003e\n\u003cli\u003eLength: 100 mm (4 in.) with a 2 1\/8 in. thread length - the partial thread profile is optimized for structural pull-through and withdrawal resistance in mass timber applications\u003c\/li\u003e\n\u003cli\u003eShank diameter of 0.315 in. with a 0.669 in. head diameter - sized for structural-grade load transfer in heavy-duty wood and steel-to-wood connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt for mass timber and CLT construction - specifically engineered for cross-laminated timber and mass timber structural connections where standard wood screws are not rated, making it the right tool for modern engineered wood assemblies\u003c\/li\u003e\n\u003cli\u003eNo predrilling required in most applications - the Type-17 point and knurled shank allow the screw to self-drill into wood, saving time on large-scale structural framing projects without sacrificing connection integrity\u003c\/li\u003e\n\u003cli\u003eDual driver compatibility removes guesswork - the combination head works with a 17 mm hex-head driver or a T40 6-lobe driver bit, so crews are not locked into a single tool type on the jobsite\u003c\/li\u003e\n\u003cli\u003eCSA O86:24 compliant hardness profile - the optimized heat treatment addresses hydrogen embrittlement concerns that can affect high-strength fasteners in the field, providing a verifiable level of quality assurance for code-sensitive structural projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Simpson Strong-Tie\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Strong-Drive SDHR COMBO-HEAD Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 100 mm (4 in.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter:\u003c\/strong\u003e 0.315 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 0.669 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length:\u003c\/strong\u003e 2 1\/8 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type:\u003c\/strong\u003e Combination\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type:\u003c\/strong\u003e T40 6-Lobe or Hex-Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type:\u003c\/strong\u003e Type-17 Point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating:\u003c\/strong\u003e E-coat Electrocoating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e E-coat Electrocoating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstrong\u003e\n\u003ch3\u003eAvailable Pack Options\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDHR12X100-R25:\u003c\/strong\u003e 25 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDHR12X100:\u003c\/strong\u003e 100 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApproved Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered Wood\u003c\/li\u003e\n\u003cli\u003eFactory-Built\/Modular Construction\u003c\/li\u003e\n\u003cli\u003eSteel-to-Wood\/Engineered Wood\u003c\/li\u003e\n\u003cli\u003eMass Timber \/ Cross-Laminated Timber\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIncludes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstall With\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall using 6-lobe T40 or 17-mm hex-head driver bit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/strong\u003e\n\u003c\/div\u003e","brand":"SIMPSON","offers":[{"title":"25 Pk","offer_id":67653521146086,"sku":"SDHR12X100-R25","price":80.44,"currency_code":"USD","in_stock":true},{"title":"100 Pk","offer_id":67653521178854,"sku":"SDHR12X100","price":214.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDHR12X100-R25_00707392033844_Product_Photo_01.jpg?v=1791498403","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdhr-combo-head-screw-12-mm-x-100-mm-black-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}