{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-13-3-4-in-t40-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 13-3\/4 in. T40 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 13-3\/4 in., T40, 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-to-wood applications. Redesigned for demanding structural connections, this fully-threaded timber screw combines a SawTooth point for fast, low-torque installation with a flat head featuring underhead nibs that countersink cleanly for a flush finish. The black e-coat electrocoating provides corrosion resistance in interior dry-service environments, making it a reliable choice for engineered wood assemblies, glulam beams, timber framing, and multi-ply fastening applications where long-term structural integrity is essential.\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 into wood surfaces for a flush, professional finish without additional prep work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty, Fully-Threaded Shank\u003c\/strong\u003e - the 0.230 in. shank diameter running full thread length delivers superior withdrawal resistance and consistent structural strength across the entire connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSawTooth Point\u003c\/strong\u003e - engineered for fast starts and reduced installation torque, eliminating the need for predrilling in most applications and speeding up large-scale timber projects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack E-Coat Electrocoating Finish\u003c\/strong\u003e - a construction-durable, nonmetallic coating that provides corrosion resistance in interior dry-service applications while enhancing overall aesthetics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep T40 6-Lobe Drive Recess\u003c\/strong\u003e - provides a secure, high-torque drive connection that reduces bit slippage and cam-out during installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Hardness Profile\u003c\/strong\u003e - works in combination with the e-coat finish to help mitigate the risk of brittle fracture, contributing to reliable long-term performance in structural applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCSA O86:24 Compliant\u003c\/strong\u003e - meets hydrogen embrittlement requirements, giving builders confidence in code-compliant mass timber and CLT construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e13-3\/4 in. (350 mm) Length\u003c\/strong\u003e - provides deep fastening penetration suited for heavy timber, beam reinforcement, and multi-ply engineered wood assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy This Product\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned specifically for mass timber and CLT\u003c\/strong\u003e - the SDCF TIMBER-CF screw is purpose-built for cross-laminated timber and mass timber construction, addressing the unique fastening demands of these high-load structural systems where standard screws are not appropriate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo predrilling required in most applications\u003c\/strong\u003e - the SawTooth point reduces installation torque significantly, saving time and labor on large timber framing and multi-ply fastening projects without compromising connection quality\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile across a wide range of structural connections\u003c\/strong\u003e - approved for wood-to-wood, wood-to-steel, beam reinforcement, surface splines, glulam, stud-to-plate, wall-to-wall, floor-to-floor, and Simpson Strong-Tie connector fastening, making it a single-screw solution across many interior structural tasks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrittle fracture risk mitigation built in\u003c\/strong\u003e - the combination of optimized hardness profile and e-coat finish directly addresses a critical concern in structural timber fastening, reducing the likelihood of sudden fastener failure over time\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 13-3\/4 in. (350 mm)\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 13-3\/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 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\u003eSDCF8X350-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\u003eSDCF8X350:\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":67653510496486,"sku":"SDCF8X350-R50","price":306.4,"currency_code":"USD","in_stock":true},{"title":"250 Pk","offer_id":67653510529254,"sku":"SDCF8X350","price":1487.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF8X350-R50_00707392028512_Product_Illustration_01.jpg?v=1791508389","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-13-3-4-in-t40-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}