{"product_id":"3-8-x-4-in-lag-screw-kit-50-pack-galvanized-hardware-for-outdoor","title":"3\/8 x 4 in Lag Screw Kit (50 Pack) - Galvanized Hardware for Outdoor","description":"\u003cp\u003eIn this review the 3\/8 x 4 in Lag Screw Kit (50 Pack) is evaluated for homeowners and pros who need a reliable supply of lag screws for deck building, fence posts, and general outdoor projects. The biggest reason to buy is the combination of quantity and corrosion protection: the kit includes 50 Grade 307A lag bolts with matching USS flat washers and a hot-dip galvanized finish that helps resist rust in exterior and ACQ-treated lumber applications. It is a practical choice when a large, consistent supply of 3\/8 in by 4 in fasteners is required.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter and length:\u003c\/strong\u003e The 3\/8 in diameter and 4 in length suit common structural connections in wood where deep embedment is needed for good hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded washers:\u003c\/strong\u003e The kit contains 50 USS flat washers (1 in OD) to distribute load and reduce wood crushing under the head during tightening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-dip galvanized:\u003c\/strong\u003e The heavy galvanizing offers superior rust resistance compared with plain steel, making these bolts suitable for outdoor and treated lumber use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial standards:\u003c\/strong\u003e Conformance to ASTM A307, ASME B18.2.1, ASME B18.21.1, and ASTM F2329 ensures consistent dimensions and material expectations for commercial or DIY projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 307A fasteners:\u003c\/strong\u003e The Grade 307A specification provides predictable tensile properties for common structural connections when installed appropriately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is aimed at homeowners, contractors, and woodworkers who undertake medium to large outdoor projects such as decks, pergolas, fencing, and structural repairs where multiple identical lag screws are needed. The large quantity and included washers reduce trips to the hardware store and keep fasteners consistent across a job.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who require stainless steel fasteners for prolonged coastal exposure or who need specialty thread forms or lengths not offered in this 3\/8 in by 4 in size. Also consider different grades if very high tensile strength beyond Grade 307A is required.\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\u003eHot-dip galvanizing provides improved corrosion resistance for outdoor projects and ACQ-treated lumber.\u003c\/li\u003e\n\u003cli\u003eLarge 50-count supply with matching 1 in OD USS washers offers good value for multi-screw jobs.\u003c\/li\u003e\n\u003cli\u003eMeets common ASTM and ASME dimensional and material standards for predictable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report mixed hold capacity under extreme loads, so pilot holes and correct installation are important to avoid breakage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead width\u003c\/td\u003e\n\u003ctd\u003e9\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003e50 lag bolts and 50 USS flat washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher outside diameter\u003c\/td\u003e\n\u003ctd\u003e1 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eHot-dip galvanized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eASTM A307, ASME B18.2.1, ASME B18.21.1, ASTM F2329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 3\/8 x 4 in Lag Screw Kit is a sensible, value-oriented choice for most outdoor woodworking and structural repair tasks where corrosion resistance and quantity matter. With Grade 307A hardware, hot-dip galvanizing, and included washers, it suits deck and fence work well; installers should use pilot holes and match fastener grade to required load to avoid issues. For general exterior projects this kit provides dependable components at a competitive price.\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 hot-dip galvanized finish is specified as suitable for use in ACQ-treated lumber to resist accelerated corrosion from treatment chemicals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the screws come with washers?\u003c\/strong\u003e\u003cbr\u003eYes, the kit includes 50 USS flat washers with a 1 in outside diameter matched to the bolts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a pilot hole required?\u003c\/strong\u003e\u003cbr\u003eA pilot hole is recommended to ease installation and reduce the risk of wood splitting or bolt breakage, especially in hardwoods.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48202316382427,"sku":"B0CSLBYFRB","price":42.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71ixnVmTyrL._SL1500.jpg?v=1769797257","url":"https:\/\/gearmusthave.com\/products\/3-8-x-4-in-lag-screw-kit-50-pack-galvanized-hardware-for-outdoor","provider":"GearMustHave","version":"1.0","type":"link"}