{"product_id":"value-collection-c39066-smooth-flange-bolt-5-8-18-unf-grade-8","title":"Value Collection C39066 Smooth Flange Bolt 5\/8-18 Unf Grade 8","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION C39066 is a smooth flange bolt designed for high-strength fastening applications requiring a wide bearing surface and clean flange seat. Sized at 5\/8-18 UNF with a 2-1\/2 inch length under head, this partially threaded bolt is manufactured from Grade 8 alloy steel, delivering the tensile strength needed in demanding mechanical and structural assemblies. The integrated smooth flange distributes clamping load over a larger area than a standard hex bolt head, reducing the need for a separate washer. The bright, uncoated finish is standard for Grade 8 fasteners used in dry or protected environments.\u003c\/p\u003e\n\u003cp\u003eThis bolt is suited for use in heavy equipment, machinery frames, HVAC structural assemblies, plumbing equipment mounts, and other industrial or trade applications where a high-strength UNF fastener with a flange bearing surface is required. Partial threading allows the unthreaded shank to bear shear loads, making it a practical choice where joint alignment and lateral forces are a concern. Installation is typically performed by millwrights, equipment technicians, or field service professionals working on mechanical assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8-18 UNF thread for fine-pitch high-strength fastening\u003c\/li\u003e\n  \u003cli\u003e2-1\/2 inch length under head for medium-depth through-bolt applications\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank absorbs shear loads at the joint\u003c\/li\u003e\n  \u003cli\u003eSmooth flange diameter of 1-21\/64 inches (1.3281 inches) distributes clamp load without a separate washer\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction meets IFI 111 and SAE J429 standards\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish appropriate for protected or indoor installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard UNF flange bolt for use in any application requiring a 5\/8-18 fine-thread Grade 8 fastener with a smooth flange head, conforming to IFI 111 and SAE J429 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall using a standard hex socket or hex wrench sized for the bolt head. Ensure mating threads are clean and free of debris before installation. Always torque to the Grade 8 specification listed in the applicable equipment service manual or fastener torque standard — do not estimate torque by feel on high-strength fasteners. Minimum order quantity for this SKU is 10 units.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-18 UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Style\u003c\/strong\u003e: Partially Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Type\u003c\/strong\u003e: Hex\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Type\u003c\/strong\u003e: Smooth\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlange Diameter\u003c\/strong\u003e: 1-21\/64 inches (1.3281 inches)\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\u003eStandards\u003c\/strong\u003e: IFI 111, 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: 0.01 pounds\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: C39066\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51696755147058,"sku":"C39066","price":51.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f89f5e640dd7ee78fc08a1cb9308597c.jpg?v=1788345900","url":"https:\/\/voomisupply.com\/products\/value-collection-c39066-smooth-flange-bolt-5-8-18-unf-grade-8","provider":"Voomi Supply","version":"1.0","type":"link"}