{"product_id":"value-collection-34581-carriage-bolt-1-4-20-3-in-zinc-grade-2","title":"Value Collection 34581 Carriage Bolt 1\/4-20 3 in Zinc Grade 2","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 34581 is a 1\/4-20 carriage bolt designed for general-purpose fastening applications where a smooth, round head and anti-rotation square neck are required. The square neck seats into the work material to prevent turning during nut tightening, eliminating the need for a secondary tool to hold the bolt head. Manufactured from Grade 2 steel with a zinc-plated finish, this fastener meets ASTM A307 standards. It measures 3 inches under the head and uses Unified National Coarse (UNC) thread. It is well suited for structural assemblies, wood-to-metal connections, and light mechanical work in trade and maintenance settings.\u003c\/p\u003e\n\u003cp\u003eThis carriage bolt is used in residential and light commercial construction, general fabrication, and maintenance applications. Typical install scenarios include securing brackets, frames, and panels where a flush, buttonhead profile on the visible face is preferred. The zinc-plated finish provides basic corrosion resistance for indoor and sheltered outdoor environments. Sold as a single bolt with a minimum order quantity of 100 pieces, making it practical for contractors and tradespeople who need consistent fastener stock on hand.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 UNC thread provides broad compatibility with standard hex nuts and threaded hardware\u003c\/li\u003e\n  \u003cli\u003eSquare neck locks into substrate to resist rotation during installation without a wrench on the head\u003c\/li\u003e\n  \u003cli\u003e3-inch length under head suits medium-depth through-bolt applications\u003c\/li\u003e\n  \u003cli\u003eGrade 2 steel construction meets ASTM A307 fastener standard\u003c\/li\u003e\n  \u003cli\u003eZinc-plated finish adds corrosion resistance for sheltered and indoor environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard inch-system carriage bolt compatible with 1\/4-20 UNC hex nuts, washers, and threaded inserts conforming to ASME and ASTM inch-series fastener standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by tradespeople and maintenance technicians using standard hand tools. Insert the bolt through a pre-drilled hole sized to allow the square neck to seat flush, preventing rotation. Tighten the mating nut from the nut side only — no wrench is needed or recommended on the round head. Follow applicable structural or mechanical codes for torque and fastener spacing requirements relevant to the assembly.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC (Unified National Coarse)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Type\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Zinc-Plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFastener Standard\u003c\/strong\u003e: ASTM A307\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 34581\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51690569302322,"sku":"34581","price":2418.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/31da8adde0e5aa13bf4782938b7b61ec.jpg?v=1788271855","url":"https:\/\/voomisupply.com\/products\/value-collection-34581-carriage-bolt-1-4-20-3-in-zinc-grade-2","provider":"Voomi Supply","version":"1.0","type":"link"}