{"product_id":"value-collection-821266msc-smooth-flange-bolt-5-8-11-unc","title":"Value Collection 821266MSC Smooth Flange Bolt 5\/8-11 Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 821266MSC is a smooth flange bolt designed for high-strength fastening applications in mechanical, structural, and industrial assembly work. It features a 5\/8-11 UNC thread with a 3-3\/4 inch length under head and partial threading of 1-1\/2 inches. Constructed from Grade 8 alloy steel with a phosphate and oil finish, this bolt delivers high tensile strength and corrosion resistance suitable for demanding service environments. The integrated smooth flange distributes clamping load evenly, eliminating the need for a separate washer. Maintenance technicians, millwrights, and field service professionals working with heavy equipment and structural connections are the typical installers.\u003c\/p\u003e\n\u003cp\u003eThis bolt is suited for use in heavy-duty mechanical assemblies, equipment frames, structural brackets, and industrial machinery where a Grade 8 alloy steel fastener with a flanged head is specified. The smooth flange face provides a clean bearing surface against the mating material without serrations, making it appropriate for assemblies where the flange must not mar or lock into the substrate. It meets IFI 111 and SAE J429 standards, confirming dimensional and mechanical compliance for inch-series fastener specifications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e5\/8-11 UNC thread form — standard inch-series coarse thread for broad tool and nut compatibility\u003c\/li\u003e\n  \u003cli\u003eGrade 8 alloy steel construction — high proof load and tensile strength for demanding structural applications\u003c\/li\u003e\n  \u003cli\u003ePartially threaded shank — 1-1\/2 inch thread length with an unthreaded grip zone for shear-load applications\u003c\/li\u003e\n  \u003cli\u003eSmooth flange face — 1-21\/64 inch (1.3281 inches) flange diameter provides load distribution without serration marks\u003c\/li\u003e\n  \u003cli\u003ePhosphate and oil finish — enhances corrosion resistance and lubricity during installation\u003c\/li\u003e\n  \u003cli\u003eMeets IFI 111 and SAE J429 standards — confirmed dimensional and mechanical compliance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with 5\/8-11 UNC hex nuts and compatible flange hardware in inch-series fastener assemblies meeting IFI 111 and SAE J429 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by mechanics, millwrights, or field technicians using standard hex drive tooling sized for 5\/8 inch fasteners. Follow torque specifications listed in the applicable equipment service manual or engineering drawings for Grade 8 hardware — do not estimate torque without a reference value. Ensure mating threads are clean and free of debris before installation. Always use a calibrated torque wrench when final tightening Grade 8 fasteners in structural or load-bearing connections.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/8-11 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 3-3\/4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1-1\/2 inches (1.5 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Style\u003c\/strong\u003e: Partially Threaded\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\u003eDrive Type\u003c\/strong\u003e: Hex\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: Phosphate and Oil\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: IFI 111, SAE J429\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.42 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: 821266MSC\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51709921591602,"sku":"821266MSC","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e7835dfa75a51d91b80da9ef17da1c90.jpg?v=1788462309","url":"https:\/\/voomisupply.com\/products\/value-collection-821266msc-smooth-flange-bolt-5-8-11-unc","provider":"Voomi Supply","version":"1.0","type":"link"}