{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-4-3-4-in-t40-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 4-3\/4 in. T40 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 4-3\/4 in. T40, E-Coat\u003c\/strong\u003e by Simpson Strong-Tie is a heavy-duty structural screw engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior wood fastening applications. The black e-coat electrocoating finish delivers a clean, construction-durable nonmetallic surface treatment that enhances aesthetics while providing corrosion resistance for interior dry-service environments. With a SawTooth point for fast starts, a fully threaded shank for maximum withdrawal resistance, and a flat head with underhead nibs for flush countersinking, this timber screw is built for performance in heavy timber, glulam, engineered wood, and multi-ply fastening applications alike.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat head with underhead nibs\u003c\/strong\u003e - enables clean countersinking so the screw seats flush with the wood surface, eliminating surface tear-out and producing a professional finish in exposed timber applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully threaded heavy-duty shank\u003c\/strong\u003e - the complete thread engagement along the 4 1\/4 in. thread length provides superb withdrawal resistance, keeping connections tight under load in mass timber and engineered wood assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSawTooth point\u003c\/strong\u003e - starts fast and drives easily, reducing installation torque and eliminating the need for predrilling in most applications, saving time on the job site\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack e-coat electrocoating finish\u003c\/strong\u003e - provides a construction-durable nonmetallic coating for corrosion resistance in interior dry-service applications, while also contributing to a visually clean result in finished timber work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep T40 6-lobe drive recess\u003c\/strong\u003e - the deep engagement of the 6-lobe recess delivers a secure, high-torque drive with reduced cam-out, making installation more reliable and less fatiguing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliant with CSA O86:24 hydrogen embrittlement requirements\u003c\/strong\u003e - the optimized hardness profile helps mitigate the risk of brittle fracture, supporting long-term structural reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.315 in. overall diameter, 0.230 in. shank diameter\u003c\/strong\u003e - sized for structural performance in timber framing, beam reinforcement, and connector fastening without overloading the surrounding wood fiber\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for cross-laminated timber and mass timber construction - the SawTooth point, fully threaded shank, and flat head with nibs work together to deliver fast installation with strong, flush results in CLT panels, glulam beams, and engineered wood assemblies without predrilling in most cases\u003c\/li\u003e\n\u003cli\u003eThe black e-coat electrocoating satisfies both functional and aesthetic demands - it provides corrosion resistance for interior dry-service conditions while delivering the clean, dark appearance that is increasingly preferred in exposed heavy timber and architectural mass timber projects\u003c\/li\u003e\n\u003cli\u003eCSA O86:24 compliance for hydrogen embrittlement - the optimized hardness profile addresses a critical structural concern in high-strength screws, making this fastener a dependable choice for structural timber applications where long-term performance matters\u003c\/li\u003e\n\u003cli\u003eVersatile across a wide range of interior wood construction tasks - from fastening wall-to-wall and stud-to-plate connections to securing Simpson Strong-Tie connectors, surface splines, butt joists, and floor-to-floor assemblies, this screw covers a broad scope of structural and framing work\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 3\/4 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter:\u003c\/strong\u003e 0.230 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 0.590 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length:\u003c\/strong\u003e 4 1\/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 T40 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\u003eSDCF8X120-R50:\u003c\/strong\u003e 50 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSDCF8X120:\u003c\/strong\u003e 250 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\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\u003eT40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/strong\u003e\n\u003c\/div\u003e","brand":"SIMPSON","offers":[{"title":"50 Pk","offer_id":67653510562022,"sku":"SDCF8X120-R50","price":107.42,"currency_code":"USD","in_stock":true},{"title":"250 Pk","offer_id":67653510594790,"sku":"SDCF8X120","price":405.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF8X120-R50_00707392028376_Product_Photo_01.jpg?v=1791508396","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-4-3-4-in-t40-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}