{"product_id":"value-collection-215518msc-carriage-bolt-3-8-16-grade-8","title":"Value Collection 215518MSC Carriage Bolt 3\/8-16 Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 215518MSC is a Grade 8 alloy steel carriage bolt designed for high-strength fastening applications. It features a 3\/8-16 UNC thread with a 1-3\/4 inch length under head, a square neck to prevent rotation during tightening, and a bright uncoated finish. Fully threaded along its entire shank length, this bolt meets SAE J429 standards for mechanical and material properties. The Grade 8 rating indicates high tensile strength, making it appropriate for structural, automotive, and heavy equipment assemblies where fastener integrity under load is critical. Licensed tradespeople and experienced fabricators typically select this bolt where carbon or lower-grade hardware is insufficient.\u003c\/p\u003e\n\u003cp\u003eThis carriage bolt is suited for a wide range of industrial, construction, and mechanical applications requiring a secure, tamper-resistant connection through wood, steel, or composite materials. The square neck seats into a mating square hole or bites into wood substrates to resist spin-out as the nut is driven from the opposite side. Common install scenarios include timber framing, trailer construction, machinery mounting, and structural steel connections where Grade 8 strength is specified by design or code.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eGrade 8 alloy steel construction for high tensile and proof-load strength per SAE J429\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 UNC thread profile for broad nut and hardware compatibility\u003c\/li\u003e\n  \u003cli\u003eSquare neck design locks bolt against rotation during assembly without a wrench on the head\u003c\/li\u003e\n  \u003cli\u003eFully threaded shank provides maximum thread engagement across the full 1-3\/4 inch working length\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish suitable for dry indoor environments or secondary coating after installation\u003c\/li\u003e\n  \u003cli\u003eInch measurement system with length measured under head per standard fastener convention\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard-dimension replacement or new-installation carriage bolt compatible with 3\/8-16 UNC nuts, washers, and insert hardware conforming to inch-series fastener specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by millwrights, ironworkers, carpenters, or general mechanics using a standard wrench or impact tool on the mating nut. Always insert the bolt from the intended bearing face so the square neck seats fully before applying torque to the nut. Do not weld, grind, or heat-treat the bolt after installation, as this will alter the Grade 8 mechanical properties. Follow applicable structural or mechanical codes for torque requirements based on joint design and load conditions.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Style\u003c\/strong\u003e: Fully Threaded\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: Alloy Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: Grade 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard\u003c\/strong\u003e: SAE J429\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 31161603\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: 215518MSC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":67949307461938,"sku":"215518MSC","price":841.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/94ee77dad00547d98ed0becb32696267_fe16ab12-f2b3-4b5e-a041-5dfd6d01bdaa.jpg?v=1791688062","url":"https:\/\/voomisupply.com\/products\/value-collection-215518msc-carriage-bolt-3-8-16-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}