{"product_id":"3-8-in-x-4-in-50-pack-zinc-carriage-bolt-kit-durable-deck","title":"3\/8 in x 4 in (50 Pack) Zinc Carriage Bolt Kit - Durable Deck","description":"\u003cp\u003eIn this review the 3\/8 in x 4 in (50 Pack) Zinc Carriage Bolt Kit is assessed for homeowners and builders who need a bulk set of semi-flush carriage bolts for outdoor wood structures. The bottom line: this kit is best for projects like decks, gazebos and pergolas where a neat, semi-flush finish and reliable shear strength matter. It stands out because it bundles Grade 307A carriage bolts with USS thick washers and grade 2 hex nuts, so buyers get a complete hardware solution without hunting for matching pieces.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Includes 50 carriage bolts, 50 USS thick washers, and 50 hex nuts so jobs can start immediately without searching for compatible hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard fit:\u003c\/strong\u003e 3\/8 in diameter and 4 in length provide common sizing that suits typical deck and pergola joinery and through-bolting needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-flush finish:\u003c\/strong\u003e The flat head gives a semi-flush appearance that reduces snagging and improves the finished look on wood surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZinc plated:\u003c\/strong\u003e Zinc plating offers moderate corrosion resistance suitable for many outdoor applications where premium stainless is not required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool compatibility:\u003c\/strong\u003e The nuts take a 9\/16 in wrench and washers are 1 in O.D., simplifying installation with common hand tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware grades:\u003c\/strong\u003e Grade 307A carriage bolts and grade 2 hex nuts mean the kit uses standard strength components for general structural fastening.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is aimed at DIY homeowners, carpenters, and small contractors who need a bulk supply of matching carriage bolts and hardware for outdoor wood projects like decks, gazebos, pergolas, playground equipment, and fencing. The semi-flush flat head is particularly useful where a cleaner appearance and reduced trip or catch points are desired.\u003c\/p\u003e\n\u003cp\u003eThose requiring high corrosion resistance for coastal or high-humidity environments, or who need higher tensile strength for critical structural applications, should consider stainless fasteners or higher-grade bolts instead of this zinc-plated, grade 307A kit.\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\u003eComplete 50-piece set saves time finding matching washers and nuts and is convenient for multi-bolt jobs.\u003c\/li\u003e\n\u003cli\u003eFlat head carriage bolts provide a neat, semi-flush finish that improves aesthetics and safety on wood surfaces.\u003c\/li\u003e\n\u003cli\u003eZinc plating gives moderate corrosion resistance suitable for many noncoastal outdoor uses.\u003c\/li\u003e\n\u003cli\u003eCommon 3\/8 in size and 9\/16 in wrench compatibility make installation straightforward with standard tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eZinc plating offers only moderate corrosion protection, so the kit is not ideal for harsh marine environments.\u003c\/li\u003e\n\u003cli\u003eGrade 307A and grade 2 nuts are standard strength but not intended for high-tension structural applications where higher grades would be preferable.\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 diameter\u003c\/td\u003e\n\u003ctd\u003e0.813 in\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\u003eNut wrench size\u003c\/td\u003e\n\u003ctd\u003e9\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish and grade\u003c\/td\u003e\n\u003ctd\u003eZinc plated, Grade 307A bolts, Grade 2 nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit quantity\u003c\/td\u003e\n\u003ctd\u003e50 bolts, 50 USS thick washers, 50 hex nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor most deck, pergola, and gazebo projects this carriage bolt kit offers good value because it supplies matched bolts, thick USS washers, and nuts in a ready-to-use 50-pack. It delivers a tidy semi-flush finish and moderate corrosion resistance at a reasonable price, but those needing marine-grade corrosion protection or higher tensile hardware should opt for stainless or higher-grade alternatives.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bolts ready to install outdoors?\u003c\/strong\u003e\u003cbr\u003eYes, the bolts are zinc plated for moderate corrosion resistance and are suitable for many outdoor applications, though not recommended for coastal marine exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the nuts fit common wrenches?\u003c\/strong\u003e\u003cbr\u003eYes, the hex nuts are sized for a 9\/16 in wrench, which is a common hand tool size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat finish does the head provide?\u003c\/strong\u003e\u003cbr\u003eThe flat carriage head gives a semi-flush finish that reduces snagging and improves the appearance on wood surfaces.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48626697502939,"sku":"B0DH75DXS1","price":41.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61xQs7mH2BL._SL1500.jpg?v=1778458875","url":"https:\/\/gearmusthave.com\/products\/3-8-in-x-4-in-50-pack-zinc-carriage-bolt-kit-durable-deck","provider":"GearMustHave","version":"1.0","type":"link"}