{"product_id":"spax-1-4-in-x-6-in-powerlag-washer-head-structural-lag-screws-heavy","title":"SPAX 1\/4 in x 6 in PowerLag Washer Head Structural Lag Screws - Heavy","description":"\u003cp\u003eIn this review the SPAX 1\/4 in x 6 in PowerLag washer head lag screws are assessed for contractors and experienced DIYers who need reliable structural wood-to-wood fasteners. The bottom line: these screws stand out for their patented thread serration and heat treated Grade 5 durability, which combine to make driving faster and reduce wood splitting, so they are ideal when strength and cleaner installation matter most. The included T-Star bit and corrosion-resistant finish add convenience, though some buyers report mixed experience with the bit fit.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented thread serration:\u003c\/strong\u003e The serrated thread profile lets the screw cut through wood more easily, reducing splitting and speeding installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat treated Grade 5:\u003c\/strong\u003e Heat treating increases tensile strength and reduces breakage under heavy loads, giving greater confidence on structural connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWasher head design:\u003c\/strong\u003e The washer head concentrates clamping force for secure connections and is tested under tough scenarios for consistent performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-Star drive included:\u003c\/strong\u003e The 6-lobe T-Star drive delivers superior bit engagement and compatibility with standard bits for quicker, lower-effort installs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion-resistant finish:\u003c\/strong\u003e The finish protects the fastener for longer service life in typical indoor structural applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCode recognized option:\u003c\/strong\u003e The T-Star screw is ICC-ES recognized for structural wood-to-wood use under ESR-1782 for added specification confidence.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese lag screws are best suited to professional builders, deck contractors, and serious DIYers installing structural wood-to-wood connections where withdrawal and pull-through performance matter. The product is aimed at users who value reduced splitting during installation and need a heavy duty fastener that will resist breakage.\u003c\/p\u003e\u003cp\u003eThose working exclusively with treated exterior applications or specialized corrosion environments should check environmental ratings and local code requirements before choosing these interior-rated, corrosion-resistant screws; installers who need an exact replacement bit fit may want to keep a spare T-Star bit on hand.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePatented thread serration drives faster and lowers splitting risk in many wood types.\u003c\/li\u003e\n\u003cli\u003eHeat treated Grade 5 construction improves strength and reduces the chance of breakage during heavy installs.\u003c\/li\u003e\n\u003cli\u003eWasher head plus corrosion-resistant finish provides reliable clamping and longer service life for indoor structural use.\u003c\/li\u003e\n\u003cli\u003eT-Star 6-lobe drive offers strong bit engagement, enabling quicker installs with less slipping.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers report mixed experience with the included bit, so a quality spare T-Star bit is recommended.\u003c\/li\u003e\n\u003cli\u003eProduct description focuses on interior use; for aggressive outdoor or marine environments, a specialized fastener may be preferable.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1\/4 in x 6 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e500 each (bulk pail)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive Type\u003c\/td\u003e\n\u003ctd\u003eT-Star 6-lobe (Torx)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial \/ Treatment\u003c\/td\u003e\n\u003ctd\u003eHeat treated Grade 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Style\u003c\/td\u003e\n\u003ctd\u003eWasher head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse\u003c\/td\u003e\n\u003ctd\u003eStructural wood-to-wood (ICC-ES ESR-1782)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eBit included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe SPAX PowerLag 1\/4 in x 6 in washer head lag screws are a solid choice for structural wood-to-wood work where driving speed, reduced splitting, and higher strength are priorities. For contractors and committed DIYers this bulk pack offers good value and dependable performance, though keep a spare T-Star bit and confirm suitability for harsh exterior environments before use.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs a bit included?\u003c\/strong\u003e\u003cbr\u003eYes, a T-Star bit is included with the bulk pail, but some users recommend keeping a spare due to mixed fit experiences.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these screws rated for structural use?\u003c\/strong\u003e\u003cbr\u003eYes, the T-Star screw is ICC-ES recognized for structural wood-to-wood applications under ESR-1782.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat improves driving and reduces splitting?\u003c\/strong\u003e\u003cbr\u003eThe patented thread serration and washer head design allow faster driving and reduce splitting compared with standard lag screws.\u003c\/p\u003e","brand":"Altenloh, Brink \u0026 Co","offers":[{"title":"Default Title","offer_id":48194049442011,"sku":"B018JR2YW2","price":184.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71_qwsroPuL._SL1500_bfe5bef1-7c45-44e4-810f-0fc251244f85.jpg?v=1770260541","url":"https:\/\/gearmusthave.com\/products\/spax-1-4-in-x-6-in-powerlag-washer-head-structural-lag-screws-heavy","provider":"GearMustHave","version":"1.0","type":"link"}