{"product_id":"5-16-in-x-5-in-carriage-bolt-kit-50-pack-hot-dip-galvanized","title":"5\/16 in x 5 in Carriage Bolt Kit (50 Pack) - Hot Dip Galvanized","description":"\u003cp\u003eOur review of this 5\/16 in x 5 in carriage bolt kit finds it best suited for builders and serious DIYers who need long-lasting exterior fasteners. The bottom line: this 50 pack delivers consistent sizes and a durable \u003cstrong\u003ehot dip galvanized\u003c\/strong\u003e finish that stands up to exterior environments, making it a straightforward choice for decks, pergolas and other heavy duty timber connections where a semi-flush head is preferred.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5\/16 in diameter, 5 in length:\u003c\/strong\u003e Provides deep embedment for thick timbers and multi-layer structural connections without relying on extension pieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot dip galvanized coating:\u003c\/strong\u003e Offers superior corrosion resistance for exterior use and compatibility with ACQ treated lumber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 50-piece kit:\u003c\/strong\u003e Includes 50 Grade 307A carriage bolts, 50 USS thick washers and 50 Grade 2\/A hex nuts so projects can proceed without parts hunting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-flush flat head:\u003c\/strong\u003e The flat head gives a neat, semi-flush finish that reduces snags and looks tidy on decks and gazebos.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliant:\u003c\/strong\u003e Meets or exceeds common mechanical and hardware standards, ensuring consistent fit and performance in structural uses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is aimed at contractors, carpenters and experienced DIY enthusiasts working on outdoor projects such as decks, pergolas, gazebos and heavy timber framing where long carriage bolts are required. The included USS washers and Grade 2\/A nuts make it convenient for teams that need uniform hardware in bulk.\u003c\/p\u003e\n\u003cp\u003eThose doing light indoor tasks or requiring specialty head types should look elsewhere; the carriage bolt head is designed for a semi-flush finish and is not ideal where a countersunk or decorative exposed head is desired.\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\u003eDurable \u003cstrong\u003ehot dip galvanized\u003c\/strong\u003e finish that resists corrosion on exterior projects.\u003c\/li\u003e\n\u003cli\u003eComplete kit packaging with 50 bolts, washers and nuts saves trip time and ensures matching parts.\u003c\/li\u003e\n\u003cli\u003eLong 5 in length and sturdy 5\/16 in diameter work well for thick timbers and multi-piece assemblies.\u003c\/li\u003e\n\u003cli\u003eMeets recognized industry standards, giving confidence in dimensional and mechanical consistency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGrade 2\/A nuts are adequate for structural assembly but not intended for high-strength critical connections where higher grade hardware might be required.\u003c\/li\u003e\n\u003cli\u003eThe flat head is semi-flush but may not suit projects that need a fully flush countersunk appearance.\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\u003e5\/16 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\u003e0.703 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher outside diameter\u003c\/td\u003e\n\u003ctd\u003e7\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNut size\u003c\/td\u003e\n\u003ctd\u003e5\/16-18, wrench 1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit quantity\u003c\/td\u003e\n\u003ctd\u003e50 bolts, 50 USS washers, 50 hex nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eHot dip galvanized for exterior use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 5\/16 in x 5 in carriage bolt kit is a practical, cost-effective choice for outdoor timber work where corrosion resistance and consistent hardware are important. Buy it if you need long bolts with a semi-flush finish and a complete parts kit; those needing higher strength grades or decorative heads should consider other options.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bolts suitable for ACQ treated lumber?\u003c\/strong\u003e\u003cbr\u003eYes. The hot dip galvanized coating is specified as suitable for use with ACQ treated lumber to resist corrosion.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included in the kit?\u003c\/strong\u003e\u003cbr\u003eThe kit contains 50 Grade 307A carriage bolts, 50 USS thick washers and 50 Grade 2\/A hex nuts, all hot dip galvanized.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat wrench size fits the nuts?\u003c\/strong\u003e\u003cbr\u003eThe hex nuts use a 1\/2 in wrench size for tightening.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48652062130395,"sku":"B0DT1LHPGM","price":43.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61QHcicxYqL._SL1500_bbef824c-cd6d-4c50-8bd2-d74118717aa2.jpg?v=1778612847","url":"https:\/\/gearmusthave.com\/products\/5-16-in-x-5-in-carriage-bolt-kit-50-pack-hot-dip-galvanized","provider":"GearMustHave","version":"1.0","type":"link"}