{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-390-in-x-17-3-4-in-t50-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.390 in. x 17-3\/4 in. T50 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.390 in. x 17 3\/4 in., T50, E-Coat\u003c\/strong\u003e by Simpson Strong-Tie is a heavy-duty structural fastener purpose-built for cross-laminated timber (CLT), mass timber construction, engineered wood assemblies, and demanding general interior applications. The fully-threaded, large-diameter shank delivers exceptional withdrawal resistance in wood-to-wood, wood-to-steel, beam reinforcement, and timber framing connections, making it a go-to choice for structural wood fastening where uncompromised holding power and a clean finish are both required.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFlat head with underhead nibs - enables clean countersinking for a flush, professional finish in exposed timber surfaces\u003c\/li\u003e\n\u003cli\u003eHeavy-duty, fully-threaded shank (0.290 in. shank diameter) - maximizes withdrawal resistance throughout the full length of the fastener, delivering structural-grade holding power in mass timber and engineered wood\u003c\/li\u003e\n\u003cli\u003eSawTooth point - ensures fast starts and easy driving while reducing installation torque, eliminating the need for predrilling in most applications and speeding up workflow\u003c\/li\u003e\n\u003cli\u003eBlack e-coat electrocoating finish - provides a construction-durable, nonmetallic corrosion-resistant coating suited for interior dry-service applications, while also enhancing the appearance of exposed timber connections\u003c\/li\u003e\n\u003cli\u003eDeep T50 6-lobe recess - delivers a secure, high-torque drive with reduced cam-out risk, compatible with the included driver bit\u003c\/li\u003e\n\u003cli\u003eOptimized hardness profile - works in combination with the e-coat finish to help mitigate the risk of brittle fracture for reliable, long-term structural performance\u003c\/li\u003e\n\u003cli\u003eCompliant with CSA O86:24 hydrogen embrittlement requirements - meets recognized structural standards for mass timber applications, giving engineers and contractors confidence in code-sensitive projects\u003c\/li\u003e\n\u003cli\u003e16 3\/4 in. thread length - maximizes thread engagement across the full working depth of the connection for superior grip in thick timber members\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered specifically for cross-laminated timber and mass timber construction - the large flat head with nibs seats cleanly without splitting or surface damage, making this screw ideal for CLT panel connections, surface splines, and glulam beam reinforcement where aesthetics and structural integrity both matter\u003c\/li\u003e\n\u003cli\u003eEliminates predrilling in most applications - the SawTooth point reduces setup time and labor on heavy timber framing, multi-ply engineered wood fastening, and stud-to-plate connections, keeping large-scale timber projects on schedule\u003c\/li\u003e\n\u003cli\u003eThe black e-coat finish goes beyond corrosion resistance - the optimized hardness profile actively mitigates brittle fracture risk, making this a structurally reliable choice for long-term interior dry-service installations in demanding load-bearing assemblies\u003c\/li\u003e\n\u003cli\u003eVersatile enough for a wide range of structural connections - from wood-to-wood and wood-to-steel fastening to Simpson Strong-Tie connector attachment, butt joist connections, and wall-to-wall assemblies, this single screw covers many of the most common structural timber fastening scenarios\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 SDCF TIMBER-CF Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 17 3\/4 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter:\u003c\/strong\u003e 0.290 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 0.725 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length:\u003c\/strong\u003e 16 3\/4 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Type:\u003c\/strong\u003e Flat Head with Nibs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive Type:\u003c\/strong\u003e T50 6-Lobe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type:\u003c\/strong\u003e SawTooth 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\u003eSDCF10X450-R25:\u003c\/strong\u003e 25 Pk - includes T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDCF10X450:\u003c\/strong\u003e 100 Pk - includes T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApproved Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFastening Wood-to-Wood\u003c\/li\u003e\n\u003cli\u003eGeneral Interior\u003c\/li\u003e\n\u003cli\u003eFastening Support Beams\u003c\/li\u003e\n\u003cli\u003eHeavy Timber\u003c\/li\u003e\n\u003cli\u003eMass Timber \/ Cross-Laminated Timber\u003c\/li\u003e\n\u003cli\u003eEngineered Wood - Multi-Ply Fastening\u003c\/li\u003e\n\u003cli\u003eFastening Simpson Strong-Tie Connectors\u003c\/li\u003e\n\u003cli\u003eEngineered Wood\u003c\/li\u003e\n\u003cli\u003eFastening Wood-to-Steel\u003c\/li\u003e\n\u003cli\u003eTimber Framing\u003c\/li\u003e\n\u003cli\u003eSurface Splines\u003c\/li\u003e\n\u003cli\u003eBeam Reinforcement\u003c\/li\u003e\n\u003cli\u003eFastening Wall-to-Wall\u003c\/li\u003e\n\u003cli\u003eGlulam\u003c\/li\u003e\n\u003cli\u003eFastening Butt Joists\u003c\/li\u003e\n\u003cli\u003eFastening Floor-to-Floor\u003c\/li\u003e\n\u003cli\u003eFastening Stud-to-Plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eT50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/strong\u003e\n\u003c\/div\u003e","brand":"SIMPSON","offers":[{"title":"25 Pk","offer_id":67653512069350,"sku":"SDCF10X450-R25","price":331.36,"currency_code":"USD","in_stock":true},{"title":"100 Pk","offer_id":67653512102118,"sku":"SDCF10X450","price":1219.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF10X450-R25_00707392028840_Product_Photo_01.jpg?v=1791561512","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-390-in-x-17-3-4-in-t50-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}