{"product_id":"3-8-in-x-3-1-2-in-galvanized-carriage-bolt-kit-50-pack","title":"3\/8 in x 3-1\/2 in Galvanized Carriage Bolt Kit (50 Pack)","description":"\u003cp\u003eIn this review the 3\/8 in x 3-1\/2 in Galvanized Carriage Bolt Kit is evaluated for outdoor and heavy-duty woodworking projects; the bottom line is that this kit is a practical choice for builders who need corrosion-resistant fasteners in bulk. The kit includes 50 carriage bolts, 50 USS flat washers, and 50 hex nuts with a hot dip galvanized coating and Grade 307A bolts, and that combination makes it particularly suited to exterior applications where rust resistance and consistent hardware sizes matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot dip galvanized coating:\u003c\/strong\u003e Provides superior corrosion resistance for long-lasting outdoor use on decks, pergolas, and fences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete 50-piece kit:\u003c\/strong\u003e Includes 50 carriage bolts, 50 USS thick washers, and 50 hex nuts so projects can be completed without hunting for matching parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent dimensions:\u003c\/strong\u003e The 3\/8 in diameter and 3-1\/2 in length give dependable holding strength and predictable fit for standard timber connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat head design:\u003c\/strong\u003e The carriage bolt flat head offers a semi-flush finish that looks cleaner on visible surfaces and reduces snagging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical hardware grades:\u003c\/strong\u003e Grade 307A carriage bolts and grade 2 hex nuts provide adequate strength for general heavy-duty exterior use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is well-suited to DIY homeowners, deck builders, and landscapers who need a reliable, corrosion-resistant set of carriage bolts and matching hardware for outdoor timber work. Anyone installing pergolas, gazebos, fence rails, or heavy lumber connections will appreciate the uniform sizing and bulk quantity.\u003c\/p\u003e\n\u003cp\u003eThose who need stainless steel or higher-strength structural fasteners for critical load-bearing engineered structures should look elsewhere; this kit is aimed at general heavy-duty exterior applications rather than specialized marine or high-tensile requirements.\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 hot dip galvanized finish that extends service life in exterior environments.\u003c\/li\u003e\n\u003cli\u003eGood value for money thanks to a full set of 50 matching bolts, washers, and nuts.\u003c\/li\u003e\n\u003cli\u003eFlat head carriage bolts give a semi-flush, neat appearance on visible installations.\u003c\/li\u003e\n\u003cli\u003eClear wrench sizing (9\/16 in) makes installation straightforward for common tool sets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWashers received mixed feedback from customers, so some projects may need different washer thickness or type.\u003c\/li\u003e\n\u003cli\u003eGrade 2 hex nuts are adequate for many uses but not intended for high-tensile 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\u003e3-1\/2 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\u003eContents\u003c\/td\u003e\n\u003ctd\u003e50 carriage bolts, 50 USS thick washers, 50 hex nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating and grades\u003c\/td\u003e\n\u003ctd\u003eHot dip galvanized; 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 3-1\/2 in Galvanized Carriage Bolt Kit is a solid, cost-effective choice for exterior woodworking and general heavy-duty fastenings. It pairs the protection of a hot dip galvanized finish with a full complement of matching hardware, making it a practical buy for builders who need uniform, rust-resistant bolts in larger quantities.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bolts suitable for outdoor use?\u003c\/strong\u003e\u003cbr\u003eYes; the hot dip galvanized coating provides superior corrosion resistance for exterior applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the nuts and washers come in matching sizes?\u003c\/strong\u003e\u003cbr\u003eYes; the kit includes 50 USS thick washers and 50 hex nuts sized to match the 3\/8 in carriage bolts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat tools are needed for installation?\u003c\/strong\u003e\u003cbr\u003eA 9\/16 in wrench is required for the hex nuts; common hand tools are sufficient for installation.\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48204808028379,"sku":"B0CST9FZ86","price":46.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61D7farZeHL._SL1500_be044452-be1a-4537-969b-d981986abfbd.jpg?v=1770356321","url":"https:\/\/gearmusthave.com\/products\/3-8-in-x-3-1-2-in-galvanized-carriage-bolt-kit-50-pack","provider":"GearMustHave","version":"1.0","type":"link"}