{"product_id":"3-8-in-x-5-in-carriage-bolt-kit-25-pack-ceramic-black-rust-defense","title":"3\/8 in x 5 in Carriage Bolt Kit (25 Pack) - Ceramic Black Rust Defense","description":"\u003cp\u003eOur review of this 3\/8 in x 5 in carriage bolt kit focuses on outdoor builders and DIYers who need a corrosion-aware, heavy duty fastener for structures that remain exposed to the elements. The kit delivers a simple, complete fastening solution with 25 Grade 307A carriage bolts, matching hex nuts and USS flat washers, and a 5-layer ceramic black ruspert coating that aims to provide twice the rust resistance of galvanized hardware. For anyone installing decks, pergolas or a small structure where a semi-flush carriage bolt head is preferred, this kit removes the need to source matching washers and nuts separately.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\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 installations can proceed without hunting for matching parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable coating:\u003c\/strong\u003e The 5-layer ceramic black ruspert finish adds enhanced rust resistance intended to outlast typical galvanized options for exterior use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard dimensions:\u003c\/strong\u003e 3\/8 in diameter and 5 in length give predictable strength and fit for common structural timber connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat head finish:\u003c\/strong\u003e The carriage bolt flat head offers a semi-flush appearance suitable for decks, gazebos and pergolas where a clean exterior surface is desired.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware grades:\u003c\/strong\u003e Grade 307A carriage bolts paired with grade 2 hex nuts and USS washers match common strength expectations for light to heavy residential projects.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is aimed at homeowners, deck builders and small-structure contractors who value a matched set of carriage bolts and prefer a black, low-profile head for outdoor projects. The 3\/8 in x 5 in size is commonly used in ledger attachments, pergola beams and post connections where a through-bolt is required.\u003c\/p\u003e\u003cp\u003eThose needing structural fasteners for engineered, high-load commercial projects or with uncommon thread or nut grade requirements should look for certified structural bolts or higher-grade nuts; this kit is best for typical residential and light commercial applications rather than specialized industrial specs.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWell matched kit saves time and ensures compatibility between bolts, washers and nuts.\u003c\/li\u003e\n\u003cli\u003e5-layer ceramic black ruspert coating improves exterior corrosion resistance versus standard galvanized finishes.\u003c\/li\u003e\n\u003cli\u003eFlat head carriage design gives a neat, semi-flush exterior appearance on wood surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSome customers report mixed results on long-term rust performance, so in extremely harsh coastal environments additional protection may be needed.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003e5 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\u003eBolt grade\u003c\/td\u003e\n\u003ctd\u003eGrade 307A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003e5-layer ceramic black ruspert coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThis 3\/8 in x 5 in carriage bolt kit is a practical, value-packed choice for DIYers and contractors working on decks, gazebos, pergolas and similar outdoor projects. The included washers and grade-matched nuts reduce hassle, and the ceramic black coating offers improved rust resistance over galvanized hardware for most exterior uses, making it a sensible purchase for typical residential applications.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre the nuts and washers included?\u003c\/strong\u003e\u003cbr\u003eYes, the kit contains 25 USS thick washers and 25 hex nuts matched to the carriage bolts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the coating suitable for coastal use?\u003c\/strong\u003e\u003cbr\u003eThe 5-layer ceramic ruspert coating provides enhanced rust resistance compared to galvanized finishes, but customers in very corrosive coastal conditions may want additional corrosion protection or higher-spec fasteners.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat head finish does the bolt have?\u003c\/strong\u003e\u003cbr\u003eThe bolts have a flat carriage head for a semi-flush appearance ideal for outdoor wood structures.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48660952940763,"sku":"B0CSTDYTBS","price":39.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61MhrxNh_KL._SL1500_f24f5359-56bb-441d-9fa6-5fb38cdc6231.jpg?v=1778670867","url":"https:\/\/gearmusthave.com\/products\/3-8-in-x-5-in-carriage-bolt-kit-25-pack-ceramic-black-rust-defense","provider":"GearMustHave","version":"1.0","type":"link"}