{"product_id":"1-4-in-x-4-1-2-in-carriage-bolt-kit-100-pack-hot-dip-galvanized","title":"1\/4 in x 4-1\/2 in Carriage Bolt Kit (100 Pack) - Hot Dip Galvanized","description":"\u003cp\u003eOur review of this 1\/4 in x 4-1\/2 in carriage bolt kit finds it best suited for homeowners and builders who need a reliable, long-lasting fastener for exterior projects. The biggest reason to buy is the hot dip galvanized coating coupled with full accessory counts: 100 Grade 307A carriage bolts, 100 USS flat washers and 100 1\/4 in-20 hex nuts, which collectively simplify large deck, pergola or gazebo builds and repairs. The review focuses on real-world fit, corrosion resistance and the semi-flush flat head that keeps finished surfaces neat.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit:\u003c\/strong\u003e Comes with 100 carriage bolts, 100 USS flat washers and 100 hex nuts so a single purchase covers large projects without repeated orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot dip galvanized:\u003c\/strong\u003e The heavy zinc coating provides superior corrosion resistance for exterior use, including contact with treated lumber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemi-flush flat head:\u003c\/strong\u003e The flat head yields a semi-flush finish that works well for decks, pergolas and visible structural connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt to standards:\u003c\/strong\u003e Meets or exceeds common industry specifications, which helps ensure dimensional consistency and interchangeability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical dimensions:\u003c\/strong\u003e 1\/4 in diameter with a 4-1\/2 in length and a 0.578 in head diameter for solid holding in medium-thickness timbers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is ideal for DIY homeowners, landscape builders and contractors who need a bulk supply of consistent carriage bolts for outdoor projects. The inclusion of USS thick washers and Grade 2\/A nuts means installers can assemble and tighten connections on-site without hunting for compatible fasteners.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include people who need stainless steel for marine environments or specialty head styles beyond the flat carriage head; this kit is specifically hot dip galvanized and focused on traditional semi-flush applications.\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 100-piece kit reduces trips to the hardware store and speeds installation for large projects.\u003c\/li\u003e\n\u003cli\u003eHot dip galvanized coating offers strong corrosion resistance for outdoor and treated lumber use.\u003c\/li\u003e\n\u003cli\u003eFlat head creates a neat, semi-flush finish that suits visible deck and pergola hardware.\u003c\/li\u003e\n\u003cli\u003eConforms to industry standards so parts are predictable and compatible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot stainless steel, so those with near-shore or highly corrosive exposures may prefer a different material.\u003c\/li\u003e\n\u003cli\u003eFixed length and head style limit use where a shorter bolt or different head is required.\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\u003e1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e4-1\/2 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\u003eNut size\u003c\/td\u003e\n\u003ctd\u003e1\/4 in-20, wrench 7\/16 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\u003eContents\u003c\/td\u003e\n\u003ctd\u003e100 carriage bolts, 100 USS flat washers, 100 Grade 2\/A 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\u003eFor anyone building or repairing decks, pergolas or other outdoor structures who wants a bulk, ready-to-use fastener set, this 100-piece carriage bolt kit offers reliable corrosion protection and a tidy semi-flush finish. It delivers strong value through complete accessory counts and standards compliance, though buyers needing stainless steel should select a different material.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bolts suitable for pressure-treated lumber?\u003c\/strong\u003e\u003cbr\u003eYes; the hot dip galvanized coating is specified as suitable for use in ACQ treated lumber and similar exterior applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the nuts match standard wrench sizes?\u003c\/strong\u003e\u003cbr\u003eThe hex nuts are 1\/4 in-20 and use a 7\/16 in wrench, which is common and easy to find in hand tool sets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the flat head sit flush with wood surfaces?\u003c\/strong\u003e\u003cbr\u003eThe flat head provides a semi-flush finish; it is designed to sit neat against wood but may not be fully countersunk without additional routing.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48202035134683,"sku":"B0DT1MJY76","price":47.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61QHcicxYqL._SL1500_0e82f5c3-b33f-4764-a4e4-8d41117f4796.jpg?v=1770235178","url":"https:\/\/gearmusthave.com\/products\/1-4-in-x-4-1-2-in-carriage-bolt-kit-100-pack-hot-dip-galvanized","provider":"GearMustHave","version":"1.0","type":"link"}