{"product_id":"construction-lag-screw-5-16in-x-12in-type-17-heavy-duty-structural","title":"Construction Lag Screw 5\/16in x 12in Type 17 - Heavy Duty Structural","description":"\u003cp\u003eIn this review the focus is on a heavy duty construction lag screw designed for demanding structural work. The bottom line is simple: if you need a long, strong screw that grips deeply and resists corrosion on treated lumber, this product delivers. Built from heat treated steel with a triple coating and a Type 17 notched point, the screw is intended for builders, deck installers and DIYers who want a reliable fastener that reduces pre-drilling and holds 4x6 and similar members tightly.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType 17 Notched Point:\u003c\/strong\u003e the extra sharp, notched point starts quickly and reduces \"walking,\" making it easier to drive into wood without extensive pilot drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat Treated Steel:\u003c\/strong\u003e manufactured from high quality heat treated steel for improved shear and compression strength compared with standard lag bolts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Coating:\u003c\/strong\u003e triple coated finish provides corrosion resistance suitable for ACQ treated lumber and prolonged outdoor use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1200 Hour Salt Spray Performance:\u003c\/strong\u003e the coating passed extended salt spray testing without failures, indicating long-term durability in corrosive environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Head and Deep Threads:\u003c\/strong\u003e the roughly 11\/16in head and ~5\/16in thread diameter pull lumber tight and provide strong bearing surface for structural connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 Count Pack:\u003c\/strong\u003e supplied in a bulk quantity that suits larger projects like decks and structural framing where many fasteners are required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis screw is aimed at professional carpenters, deck builders and serious DIYers who work with heavy lumber and ACQ treated wood and need a reliable structural fastener. Its combination of heat treated steel, robust thread diameter and long 12in length makes it a good choice when connecting wide posts, beams and when deep embedment is required.\u003c\/p\u003e\n\u003cp\u003eThose doing fine woodworking, light trim or projects where a smaller or countersunk fastener is needed should look elsewhere; this product is intended for structural connections and can be overkill for delicate or visible finish work.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent strength and holding power for structural joins, outperforming common lag bolts in shear and compression.\u003c\/li\u003e\n\u003cli\u003eCorrosion resistant triple coating and verified 1200 hour salt spray performance for use with ACQ treated lumber.\u003c\/li\u003e\n\u003cli\u003eType 17 notched point reduces need for pre-drilling and improves driving speed without walking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLarge 12in length and head make these unsuitable for finish carpentry or applications needing concealed fasteners.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Diameter\u003c\/td\u003e\n\u003ctd\u003e~5\/16in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Diameter\u003c\/td\u003e\n\u003ctd\u003e11\/16in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e12in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHeat treated steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive Type\u003c\/td\u003e\n\u003ctd\u003eTorx\/Star drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eTriple coated, ACQ compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Count\u003c\/td\u003e\n\u003ctd\u003e100 screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor anyone building decks, pergolas or structural frames who needs deep, reliable holding power in treated lumber, this 12in Type 17 construction lag screw is a practical choice. It pairs robust steel construction with a proven coating and a point designed to start quickly, offering strong value for large projects where corrosion resistance and strength matter most.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these screws suitable for ACQ treated lumber?\u003c\/strong\u003e\u003cbr\u003eYes. The triple coating and ACQ compatibility are specified so they can be used with treated wood.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they require pre-drilling?\u003c\/strong\u003e\u003cbr\u003eThe Type 17 notched point reduces the need for pre-drilling in many cases, though pilot holes may still be advisable in very dense hardwoods.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat drive type is required?\u003c\/strong\u003e\u003cbr\u003eThey use a Torx\/Star drive which offers better torque transfer than common hex heads for heavy driving.\u003c\/p\u003e","brand":"Jake Sales","offers":[{"title":"Default Title","offer_id":48178335252699,"sku":"B07ZW91F1V","price":234.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61K4qoMn23L._SL1500.jpg?v=1769489296","url":"https:\/\/gearmusthave.com\/products\/construction-lag-screw-5-16in-x-12in-type-17-heavy-duty-structural","provider":"GearMustHave","version":"1.0","type":"link"}