{"product_id":"3-8-in-x-3-in-carriage-bolt-kit-25-pack-ceramic-black-rust","title":"3\/8 in x 3 in Carriage Bolt Kit (25 Pack) - Ceramic Black Rust","description":"\u003cp\u003eOur review of this 3\/8 in x 3 in carriage bolt kit finds it best suited to homeowners and contractors who need a durable, visually discreet fastener for outdoor timber projects. The biggest reason to buy is the five-layer ceramic black ruspert coating that promises improved rust resistance compared to plain galvanized fasteners, giving a semi-flush, finished look for decks, pergolas, and pavilion work. The kit format with washers and nuts makes it convenient for multi-point jobs, and the Grade 307A bolt strength paired with grade 2 nuts covers most common structural fastening needs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Includes 25 carriage bolts, 25 USS thick washers, and 25 hex nuts so a single purchase covers entire small projects without searching for matching hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtected finish:\u003c\/strong\u003e Five-layer ceramic black ruspert coating offers greater rust resistance than standard galvanized finishes and keeps exposed fasteners looking uniform outdoors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-flush head:\u003c\/strong\u003e The carriage bolt flat head yields a semi-flush appearance, which is ideal for visible timber connections on decks, gazebos, and pergolas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear sizing:\u003c\/strong\u003e 3\/8 in diameter and 3 in length with a 0.813 in head diameter make it straightforward to plan drill sizes and embedment for structural joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSimple installation:\u003c\/strong\u003e Nut wrench size 9\/16 in and 1 in washer outside diameter means common tools fit and distribute load effectively on wood members.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is for DIYers, deck builders, pergola makers, and small contractors who want a coordinated set of carriage bolts with matching washers and nuts in a black finish. It suits projects where appearance matters and a semi-flush carriage head is preferred over exposed hex heads.\u003c\/p\u003e\n\u003cp\u003eThose building extremely heavy structural connections that require higher grade hardware or who need stainless corrosion resistance for marine environments should look elsewhere; the Grade 307A bolt with grade 2 nuts and a ruspert coating is durable for most outdoor woodwork but is not a stainless alloy for saltwater conditions.\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\u003eWell matched kit reduces time spent sourcing compatible washers and nuts for each bolt.\u003c\/li\u003e\n\u003cli\u003eCeramic black ruspert coating provides noticeably better rust resistance than plain galvanized fasteners in typical outdoor settings.\u003c\/li\u003e\n\u003cli\u003eSemi-flush carriage head delivers a clean, finished look on visible timber surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers reported mixed long-term rust resistance in very exposed conditions, so performance may vary by environment.\u003c\/li\u003e\n\u003cli\u003eGrade 2 hex nuts are adequate for many jobs but not intended for the highest strength structural applications.\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\u003e3 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\u003eNut wrench size\u003c\/td\u003e\n\u003ctd\u003e9\/16 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\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003e25 bolts, 25 USS thick washers, 25 hex nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating and grade\u003c\/td\u003e\n\u003ctd\u003e5-layer ceramic black ruspert coating; Grade 307A bolts, grade 2 nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 3\/8 in x 3 in carriage bolt kit is a practical, good-value choice for outdoor wood projects where appearance and improved rust resistance matter. The matched washers and nuts and the semi-flush head make installation tidy and efficient, while the ceramic ruspert coating gives better corrosion protection than standard galvanized options for most residential and light commercial uses.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bolts suitable for deck framing?\u003c\/strong\u003e\u003cbr\u003eYes, they are suitable for typical deck connections and visible deck trim where a semi-flush finish is desired, though very heavy structural framing may require higher grade fasteners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much corrosion protection does the coating provide?\u003c\/strong\u003e\u003cbr\u003eThe five-layer ceramic ruspert coating offers approximately twice the rust resistance of basic galvanized finishes in common outdoor conditions, but performance varies with exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo washers and nuts match the bolts?\u003c\/strong\u003e\u003cbr\u003eYes, the kit includes 25 USS thick washers and 25 hex nuts sized to fit the 3\/8 in bolts for a complete matched set.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48612685021403,"sku":"B0CSTBM6NV","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61cbcjyUQEL._SL1500_2b2b1f7e-bc2d-48c9-96ab-941a8472f88e.jpg?v=1778352790","url":"https:\/\/gearmusthave.com\/products\/3-8-in-x-3-in-carriage-bolt-kit-25-pack-ceramic-black-rust","provider":"GearMustHave","version":"1.0","type":"link"}