{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-8-5-8-in-t40-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 8-5\/8 in. T40 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 8-5\/8 in. T40, E-Coat\u003c\/strong\u003e by \u003cstrong\u003eSimpson Strong-Tie\u003c\/strong\u003e is a heavy-duty structural fastener engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior wood applications. Redesigned for performance, this fully-threaded timber screw delivers uncompromised withdrawal resistance and reliable long-term strength in engineered wood, glulam, heavy timber framing, and multi-ply fastening situations. The black e-coat electrocoating finish gives it a clean, professional appearance while providing construction-durable corrosion resistance for interior dry-service environments - making it a go-to choice for structural wood-to-wood, wood-to-steel, and connector fastening work.\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, flush countersinking so the screw sits level with the wood surface for a professional finish in visible timber applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty, fully-threaded shank (0.230 in. shank diameter)\u003c\/strong\u003e - maximizes grip and withdrawal resistance along the full 8 5\/8 in. length, delivering the structural holding power required for mass timber and CLT connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSawTooth point\u003c\/strong\u003e - provides fast starts and reduced installation torque, eliminating the need for predrilling in most applications and significantly speeding up high-volume timber fastening work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack e-coat electrocoating finish\u003c\/strong\u003e - a construction-durable nonmetallic coating that resists corrosion in interior dry-service conditions while enhancing the aesthetics of exposed timber connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized hardness profile\u003c\/strong\u003e - works alongside the e-coat finish to mitigate the risk of brittle fracture, supporting reliable, long-term structural performance in demanding load applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep T40 6-lobe recess drive\u003c\/strong\u003e - provides a secure, cam-out-resistant connection between driver and fastener, reducing slippage and driver wear during high-torque installation into heavy timber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliant with CSA O86:24 hydrogen embrittlement requirements\u003c\/strong\u003e - meets Canadian standard requirements, supporting use in code-compliant mass timber and CLT structural assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread length: 8 1\/4 in.\u003c\/strong\u003e - near full-length threading ensures engagement throughout the fastener's depth for maximum wood-to-wood clamping and pull-through resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurpose-built for mass timber and CLT construction\u003c\/strong\u003e - unlike general-purpose wood screws, this fastener is specifically designed for cross-laminated timber and engineered wood applications where structural integrity and precise countersinking are critical requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates predrilling in most applications\u003c\/strong\u003e - the SawTooth point cuts into wood fibers cleanly on entry, reducing labor time and setup steps on job sites where hundreds of fasteners may be driven into heavy timber members\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes a T40 6-lobe driver bit in the package\u003c\/strong\u003e - the required driver bit is included, so installers can get to work immediately without sourcing a separate bit for this specialized drive format\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeets CSA O86:24 hydrogen embrittlement requirements\u003c\/strong\u003e - for projects requiring compliance with Canadian engineered wood standards, this screw satisfies the hydrogen embrittlement specification, reducing risk and supporting code approval documentation\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 8 5\/8 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 8 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\u003eSDCF8X220-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\u003eSDCF8X220:\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\u003eMass Timber \/ Cross-Laminated Timber (CLT)\u003c\/li\u003e\n\u003cli\u003eHeavy Timber construction\u003c\/li\u003e\n\u003cli\u003eTimber Framing\u003c\/li\u003e\n\u003cli\u003eGlulam beam fastening\u003c\/li\u003e\n\u003cli\u003eEngineered Wood - Multi-Ply Fastening\u003c\/li\u003e\n\u003cli\u003eEngineered Wood assemblies\u003c\/li\u003e\n\u003cli\u003eBeam Reinforcement\u003c\/li\u003e\n\u003cli\u003eFastening Wood-to-Wood\u003c\/li\u003e\n\u003cli\u003eFastening Wood-to-Steel\u003c\/li\u003e\n\u003cli\u003eFastening Simpson Strong-Tie Connectors\u003c\/li\u003e\n\u003cli\u003eFastening Support Beams\u003c\/li\u003e\n\u003cli\u003eSurface Splines\u003c\/li\u003e\n\u003cli\u003eFastening Wall-to-Wall\u003c\/li\u003e\n\u003cli\u003eFastening Floor-to-Floor\u003c\/li\u003e\n\u003cli\u003eFastening Butt Joists\u003c\/li\u003e\n\u003cli\u003eFastening Stud-to-Plate\u003c\/li\u003e\n\u003cli\u003eGeneral Interior applications\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":67653511282918,"sku":"SDCF8X220-R50","price":177.65,"currency_code":"USD","in_stock":true},{"title":"250 Pk","offer_id":67653511315686,"sku":"SDCF8X220","price":769.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF8X220-R50_00707392028451_Product_Photo_01.jpg?v=1791508425","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-8-5-8-in-t40-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}