{"product_id":"1-4-in-x-3-in-carriage-bolt-kit-100-pack-hot-dip-galvanized","title":"1\/4 in x 3 in Carriage Bolt Kit (100 Pack) - Hot Dip Galvanized","description":"\u003cp\u003eOur review of this 1\/4 in x 3 in carriage bolt kit finds it best suited for builders and DIYers who need a reliable, corrosion-resistant fastener pack for outdoor projects. The single biggest reason to buy is the hot dip galvanized coating combined with a complete hardware set: 100 Grade 307A carriage bolts, 100 USS flat washers and 100 hex nuts. That combination removes the usual hassle of sourcing matching pieces, and the flat head design gives a semi-flush finish that works well on decks, pergolas and other heavy duty timber applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Includes 100 carriage bolts, 100 USS flat washers and 100 hex nuts so projects can proceed without hunting down matching parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot dip galvanized coating:\u003c\/strong\u003e Provides superior corrosion resistance for exterior use and compatibility with ACQ treated lumber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat head design:\u003c\/strong\u003e The semi-flush flat head reduces snagging and yields a cleaner look on deck and pergola surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard fit:\u003c\/strong\u003e The 1\/4 in-20 nut thread and 7\/16 in wrench size make these bolts easy to use with common tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeets industry specs:\u003c\/strong\u003e Manufactured to meet or exceed relevant ASME and ASTM standards for consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is aimed at contractors, deck builders and serious DIYers who install outdoor structures and need a bulk supply of matched carriage bolts and hardware. The hot dip galvanized finish and Grade 307A bolts make it appropriate for use with ACQ treated lumber and other exterior applications where corrosion resistance matters.\u003c\/p\u003e\u003cp\u003eHobbyists with small one-off projects might find the 100-piece quantity more than required, and those needing larger diameters or specialty head styles should look for alternate fasteners better matched to those specific needs.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete 100-piece kit removes the need to source washers and nuts separately, saving time.\u003c\/li\u003e\n\u003cli\u003eHot dip galvanized finish offers strong corrosion protection for outdoor and ACQ lumber projects.\u003c\/li\u003e\n\u003cli\u003eFlat head carriage bolt provides a semi-flush finish that improves appearance and reduces tripping or snag points.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePack size is large for casual users with only a few fasteners needed.\u003c\/li\u003e\n\u003cli\u003eLimited to 1\/4 in diameter and 3 in length, so not suitable for thicker assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e1\/4 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\u003e0.578 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher outside diameter\u003c\/td\u003e\n\u003ctd\u003e47\/64 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNut thread and size\u003c\/td\u003e\n\u003ctd\u003e1\/4 in-20, 7\/16 in wrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003e100 carriage bolts, 100 USS flat washers, 100 hex nuts\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\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThis 1\/4 in x 3 in carriage bolt kit is a practical, cost-effective choice for those building decks, gazebos, pergolas or other outdoor wood structures. The matched hardware and hot dip galvanized coating deliver reliable corrosion resistance and convenience, making the kit good value for contractors and DIYers who need a bulk supply of standardized fasteners.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these bolts suitable for pressure-treated lumber?\u003c\/strong\u003e\u003cbr\u003eYes, the hot dip galvanized coating is suitable for use with ACQ treated lumber and other exterior applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat tools are required to install these bolts?\u003c\/strong\u003e\u003cbr\u003eThe nuts require a 7\/16 in wrench and the carriage bolts seat with a standard hammer or mallet; common hand tools are sufficient.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the kit include washers and nuts?\u003c\/strong\u003e\u003cbr\u003eYes, the kit includes 100 USS thick flat washers and 100 Grade 2\/A hex nuts matched to the 1\/4 in-20 thread.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48645898633435,"sku":"B0DT1KCV16","price":41.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/6147GKJgIHL._SL1500_dad0700b-1835-41b8-bf05-231e0d409a8f.jpg?v=1778595806","url":"https:\/\/gearmusthave.com\/products\/1-4-in-x-3-in-carriage-bolt-kit-100-pack-hot-dip-galvanized","provider":"GearMustHave","version":"1.0","type":"link"}