{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-390-in-x-4-in-t50-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.390 in. x 4 in. T50 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.390 in. x 4 in., T50, E-Coat\u003c\/strong\u003e by Simpson Strong-Tie is a structural wood screw engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior fastening applications. The redesigned SDCF Timber-CF combines a fully-threaded heavy-duty shank with a black e-coat electrocoating finish, delivering reliable withdrawal resistance and corrosion protection in interior dry-service environments. Whether you are securing glulam beams, fastening engineered wood assemblies, or connecting Simpson Strong-Tie hardware connectors, this screw is purpose-built for structural timber applications where uncompromised strength and clean installation matter most.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFlat head with underhead nibs - countersinks cleanly into timber surfaces for a flush, professional finish that does not require additional surface preparation\u003c\/li\u003e\n\u003cli\u003eHeavy-duty, fully-threaded shank - maximizes withdrawal resistance along the full length of the fastener, providing consistent structural holding power in mass timber and engineered wood applications\u003c\/li\u003e\n\u003cli\u003eSawTooth point - starts fast and drives easily without predrilling in most applications, saving installation time and reducing setup effort\u003c\/li\u003e\n\u003cli\u003eBlack e-coat electrocoating finish - provides a construction-durable, nonmetallic coating for corrosion resistance in interior dry-service conditions 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 that reduces cam-out and keeps the driver bit firmly engaged during installation\u003c\/li\u003e\n\u003cli\u003eOptimized hardness profile - works together with the e-coat finish to help mitigate the risk of brittle fracture, supporting long-term structural reliability\u003c\/li\u003e\n\u003cli\u003eCompliant with CSA O86:24 hydrogen embrittlement requirements - meets Canadian engineered wood design standards for structural screw performance\u003c\/li\u003e\n\u003cli\u003e0.290 in. shank diameter with 3 5\/8 in. thread length - delivers deep thread engagement for strong wood-to-wood and wood-to-steel connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for CLT and mass timber - the SDCF Timber-CF is purpose-engineered for cross-laminated timber, glulam, multi-ply engineered wood, and heavy timber framing where standard screws may not meet structural demands\u003c\/li\u003e\n\u003cli\u003eEliminates predrilling in most applications - the SawTooth point reduces installation torque and gets you started immediately, cutting labor time on large-scale timber construction and general interior fastening projects\u003c\/li\u003e\n\u003cli\u003eBlack e-coat finish serves dual purposes - the nonmetallic electrocoating provides interior corrosion protection while also delivering an aesthetically consistent look for exposed timber connections and beam reinforcement work\u003c\/li\u003e\n\u003cli\u003eMeets CSA O86:24 hydrogen embrittlement standards - for projects requiring verified compliance with Canadian structural wood design codes, this screw satisfies those requirements without needing a substitute fastener\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 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 3 5\/8 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\u003eSDCF10X100-R30:\u003c\/strong\u003e 30 Pk - includes T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDCF10X100:\u003c\/strong\u003e 250 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":"30 Pk","offer_id":67653512167654,"sku":"SDCF10X100-R30","price":77.89,"currency_code":"USD","in_stock":true},{"title":"250 Pk","offer_id":67653512200422,"sku":"SDCF10X100","price":495.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF10X100-R30_00707392028277_Product_Photo_01.jpg?v=1791561518","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-390-in-x-4-in-t50-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}