{"product_id":"simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-5-1-2-in-t40-e-coat","title":"Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 5-1\/2 in. T40 (Black E-Coat)","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSimpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 5 1\/2 in. T40, E-Coat\u003c\/strong\u003e by Simpson Strong-Tie is a high-performance structural fastener engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood-to-wood applications. The redesigned SDCF Timber-CF screw delivers uncompromised strength in demanding heavy timber, glulam, and engineered wood assemblies, combining a flat head with underhead nibs for a clean, flush countersink with a SawTooth point that starts fast and drives with reduced torque - no predrilling required in most applications. The black e-coat electrocoating finish adds a construction-durable, nonmetallic layer that resists corrosion in interior dry-service environments while also contributing to the screw's optimized hardness profile, helping mitigate the risk of brittle fracture for reliable, long-term performance.\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 timber and engineered wood surfaces, leaving a flush, professional finish without additional prep work\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-duty, fully-threaded shank\u003c\/strong\u003e - maximizes thread engagement along the entire shank length, delivering superb withdrawal resistance in mass timber and multi-ply engineered wood applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSawTooth point\u003c\/strong\u003e - cuts into wood fibers quickly for fast starts and easy driving, reducing installation torque and eliminating the need for predrilling in most applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack e-coat electrocoating finish\u003c\/strong\u003e - provides a construction-durable nonmetallic coating that resists corrosion in interior dry-service applications while enhancing aesthetics in exposed timber assemblies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep T40 6-lobe recess\u003c\/strong\u003e - creates a secure, high-torque connection between driver and screw head, reducing cam-out and improving drive control during heavy timber installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized hardness profile\u003c\/strong\u003e - works in combination with the e-coat finish to mitigate the risk of brittle fracture, supporting long-term structural integrity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompliant with CSA O86:24 hydrogen embrittlement requirements\u003c\/strong\u003e - meets current Canadian structural wood design standards, supporting use in code-compliant mass timber projects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.315 in. diameter x 5 1\/2 in. length\u003c\/strong\u003e - sized for deep penetration and strong purchase in thick timber members, beams, and multi-ply panels\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 - the SDCF Timber-CF screw is specifically designed for cross-laminated timber, glulam, heavy timber framing, and engineered wood multi-ply fastening, making it a purpose-matched choice where standard screws fall short\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates predrilling in most applications\u003c\/strong\u003e - the SawTooth point self-starts and reduces installation torque, saving significant time and labor on large timber assemblies where drilling every pilot hole would slow production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned to resist brittle fracture risk\u003c\/strong\u003e - the combination of optimized hardness profile and e-coat electrocoating directly addresses a critical failure mode in structural screws, supporting reliable long-term performance in demanding load-bearing applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with Simpson Strong-Tie connectors\u003c\/strong\u003e - the SDCF screw is listed for use with Simpson Strong-Tie hardware connectors, allowing consistent, engineered fastening solutions across timber connections and beam reinforcement details\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 5 1\/2 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 5 1\/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 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\u003eSDCF8X140-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\u003eSDCF8X140:\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\u003c\/li\u003e\n\u003cli\u003eHeavy Timber\u003c\/li\u003e\n\u003cli\u003eTimber Framing\u003c\/li\u003e\n\u003cli\u003eGlulam\u003c\/li\u003e\n\u003cli\u003eEngineered Wood - Multi-Ply Fastening\u003c\/li\u003e\n\u003cli\u003eEngineered Wood\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 Support Beams\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\u003eSurface Splines\u003c\/li\u003e\n\u003cli\u003eFastening Simpson Strong-Tie Connectors\u003c\/li\u003e\n\u003cli\u003eGeneral Interior\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":67653510725862,"sku":"SDCF8X140-R50","price":113.8,"currency_code":"USD","in_stock":true},{"title":"250 Pk","offer_id":67653510758630,"sku":"SDCF8X140","price":452.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0398\/5188\/4705\/files\/SDCF8X140-R50_00707392028390_Product_Photo_02.jpg?v=1791508404","url":"https:\/\/factorydirectsupply.com\/products\/simpson-strong-drive-sdcf-timber-cf-screw-0-315-in-x-5-1-2-in-t40-e-coat","provider":"Factory Direct Supply","version":"1.0","type":"link"}