{"product_id":"carriage-bolt-5-16-18-x-3-in-galvanized-100-pcs-durable-fastening","title":"Carriage Bolt 5\/16-18 x 3 in Galvanized, 100 PCS - Durable Fastening","description":"\u003cp\u003eIn this review the Hillman carriage bolts are judged on durability and fit for common carpentry and metalwork tasks; they are best for DIYers and contractors who need a bulk supply of fasteners that resist rust and provide a neat, semi-flush finish. The single biggest reason to buy is the combination of the self-locking square neck and galvanized coating, which together make these bolts easy to set into wood and give reasonable corrosion protection for exterior or indoor projects.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eSelf-locking square neck:\u003c\/strong\u003e The square underside of the head sits into a predrilled hole to prevent the head from turning during installation, simplifying assembly without a separate driving tool.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFlat head design:\u003c\/strong\u003e The flat rounded head provides a semi-flush finish that hides the fastener while eliminating the need for a washer in many wood-to-wood and wood-to-metal joints.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGalvanized finish:\u003c\/strong\u003e Zinc plating reduces the risk of rust in moderate outdoor conditions, extending service life compared with plain steel bolts.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eBulk pack of 100:\u003c\/strong\u003e Supplied in a 100 piece quantity to cover multiple projects or on-site needs, which is convenient for builders and hobbyists.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStandard thread size:\u003c\/strong\u003e The 5\/16-18 thread is a common pitch that fits into pre tapped or nut-equipped assemblies for secure clamping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese carriage bolts suit homeowners tackling deck repairs, fence building, pergola assembly and other woodwork where a rounded head and square neck are desirable. Tradespeople who install many wood-to-metal connections will appreciate the time saved by the self-locking head and the economy of a 100 piece pack.\u003c\/p\u003e\n\u003cp\u003eThey are less appropriate for applications requiring heavy marine exposure or stainless steel corrosion resistance, or where precision thread quality is critical for tapped metal parts; customers needing fine-thread perfection or highly corrosive environment protection should consider specialty fasteners instead.\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\u003eGalvanized coating offers practical rust resistance for most exterior and indoor projects.\u003c\/li\u003e\n \u003cli\u003eSquare neck prevents spinning so installation is faster and easier without extra tools.\u003c\/li\u003e\n \u003cli\u003eFlat head gives a neat, semi-flush appearance and can eliminate the need for washers.\u003c\/li\u003e\n \u003cli\u003ePack of 100 provides good value and reduces repeat ordering for large jobs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eSome customers report inconsistent thread quality, so a small number may not thread smoothly in all applications.\u003c\/li\u003e\n \u003cli\u003eGalvanized finish can appear chalky and is not a substitute for stainless steel in highly corrosive environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCarriage bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e5\/16-18 x 3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGalvanized (zinc plated)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e100 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eHead style\u003c\/td\u003e\n\u003ctd\u003eRound flat head with square neck\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTypical use\u003c\/td\u003e\n\u003ctd\u003eWood-to-wood and wood-to-metal fastening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor most DIYers and contractors who need a reliable, economical bulk pack of carriage bolts, these deliver good value thanks to the self-locking square neck and galvanized finish. They perform well in standard outdoor and indoor projects, though buyers should inspect threads if using in precision metal tapping or very corrosive environments.\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 galvanized finish provides moderate corrosion resistance appropriate for typical outdoor and covered exposures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these require a washer?\u003c\/strong\u003e\u003cbr\u003eThe flat head design is intended to eliminate the need for a washer in many wood applications, though a washer or nut may still be used on the far side for added clamping.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the head spin during installation?\u003c\/strong\u003e\u003cbr\u003eNo, the square underside of the head is self-locking when seated in a square or tight hole, which prevents the head from turning.\u003c\/p\u003e","brand":"Hillman","offers":[{"title":"Default Title","offer_id":48199470219483,"sku":"B000B4KZRS","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61ucgp_QeqL._AC_SL1500_4fc584a7-a564-4a3d-a51d-fae58e350fb0.jpg?v=1770371390","url":"https:\/\/gearmusthave.com\/products\/carriage-bolt-5-16-18-x-3-in-galvanized-100-pcs-durable-fastening","provider":"GearMustHave","version":"1.0","type":"link"}