{"product_id":"royal-enfield-591578a-hex-flange-bolt-m6x35-classic-bullet-thunderbird","title":"Royal Enfield 591578\/A Hex Flange Bolt – M6×35 mm 8.8 ZnFe (White) OEM Bolt for Classic \/ Bullet \/ Thunderbird UCE Models","description":"\u003cp data-end=\"1119\" data-start=\"1039\"\u003e\u003cspan style=\"color: rgb(240, 0, 0);\"\u003e\u003cstrong\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eNOW SOLD AS A PACK OF 10 PCS (FROM 18 JAN 2025)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1119\" data-start=\"1039\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eSecure your Royal Enfield with the \u003cstrong data-end=\"63\" data-start=\"35\"\u003e591578\/A Hex Flange Bolt\u003c\/strong\u003e, the factory-standard fastener used across UCE-era export models. With an M6 × 35 mm thread, flange head, and Grade 8.8 steel with Zinc-Iron white plating, this bolt delivers exceptional strength and resistance to rust and corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1160\" data-start=\"1121\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eThis OEM bolt is used in multiple assemblies including frame mounting, mudguard screws, seat fixtures, exhaust bolts, and more. Properly engineered to exact factory specs, it ensures accurate torque, fit, and durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"1201\" data-start=\"1162\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eCompatible with \u003cstrong data-end=\"31\" data-start=\"16\"\u003eClassic 350\u003c\/strong\u003e, \u003cstrong data-end=\"52\" data-start=\"33\"\u003eClassic 500 EFI\u003c\/strong\u003e, \u003cstrong data-end=\"72\" data-start=\"54\"\u003eBullet 350\/500\u003c\/strong\u003e, and \u003cstrong data-end=\"101\" data-start=\"78\"\u003eThunderbird 350\/500\u003c\/strong\u003e UCE export variants. Sold individually, this bolt is ideal for maintenance, restoration, or replacement of worn hardware. Compatible OEM fit, globally shipped with return support.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-end=\"1206\" data-start=\"1203\"\u003e\n\u003ch2 data-end=\"1235\" data-start=\"1208\"\u003e✔️ Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul data-end=\"1665\" data-start=\"1236\"\u003e\n\u003cli data-end=\"1319\" data-start=\"1236\"\u003e\n\u003cp data-end=\"1319\" data-start=\"1238\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"20\" data-start=\"0\"\u003eGenuine OEM part\u003c\/strong\u003e: Royal Enfield 591578\/A — exact factory fit\u003c\/span\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1363\" data-start=\"1320\"\u003e\n\u003cp data-end=\"1363\" data-start=\"1322\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"25\" data-start=\"0\"\u003eHigh tensile strength\u003c\/strong\u003e: Grade 8.8 steel—built for vibration resistance\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1407\" data-start=\"1364\"\u003e\n\u003cp data-end=\"1407\" data-start=\"1366\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"31\" data-start=\"0\"\u003eCorrosion-resistant coating\u003c\/strong\u003e: ZnFe white plating for long-lasting finish\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1491\" data-start=\"1408\"\u003e\n\u003cp data-end=\"1491\" data-start=\"1410\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"22\" data-start=\"0\"\u003eWide fitment range\u003c\/strong\u003e: UCE-era Classic, Bullet, and Thunderbird models (export variants)\u003c\/span\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003cspan class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1535\" data-start=\"1492\"\u003e\n\u003cp data-end=\"1535\" data-start=\"1494\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"20\" data-start=\"0\"\u003ePrecise OEM spec\u003c\/strong\u003e: M6 × 35 thread, flanged hex head—uses exact torque settings\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1579\" data-start=\"1536\"\u003e\n\u003cp data-end=\"1579\" data-start=\"1538\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"22\" data-start=\"0\"\u003eDirect replacement\u003c\/strong\u003e: No modifications needed; bolt-on replacement\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1623\" data-start=\"1580\"\u003e\n\u003cp data-end=\"1623\" data-start=\"1582\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"21\" data-start=\"0\"\u003eReliable sourcing\u003c\/strong\u003e: Verified via official catalogs and trusted suppliers\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1665\" data-start=\"1624\"\u003e\n\u003cp data-end=\"1665\" data-start=\"1626\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"24\" data-start=\"0\"\u003eLow-cost maintenance\u003c\/strong\u003e: Perfect for keeping your bike factory stock and secure\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1670\" data-start=\"1667\"\u003e\n\u003ch2 data-end=\"1695\" data-start=\"1672\"\u003e🧩 Variant Options\u003c\/h2\u003e\n\u003cul data-end=\"1737\" data-start=\"1696\"\u003e\n\u003cli data-end=\"1737\" data-start=\"1696\"\u003e\n\u003cp data-end=\"1737\" data-start=\"1698\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e\u003cstrong data-is-only-node=\"\" data-end=\"26\" data-start=\"0\"\u003e10 X Hex Flange Bolt\u003c\/strong\u003e – Royal Enfield \u003cstrong data-end=\"55\" data-start=\"43\"\u003e591578\/A\u003c\/strong\u003e (M6×35 mm, Grade 8.8, ZnFe white)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1815\" data-start=\"1812\"\u003e\n\u003ch2 data-end=\"1844\" data-start=\"1817\"\u003e📋 Specification Table\u003c\/h2\u003e\n\u003cdiv class=\"_tableContainer_16hzy_1\"\u003e\n\u003cdiv class=\"_tableWrapper_16hzy_14 group flex w-fit flex-col-reverse\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\" data-end=\"2597\" data-start=\"1846\"\u003e\n\u003cthead data-end=\"1913\" data-start=\"1846\"\u003e\n\u003ctr data-end=\"1913\" data-start=\"1846\"\u003e\n\u003cth data-col-size=\"sm\" data-end=\"1866\" data-start=\"1846\"\u003eAttribute\u003c\/th\u003e\n\u003cth data-col-size=\"sm\" data-end=\"1913\" data-start=\"1866\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody data-end=\"2597\" data-start=\"1981\"\u003e\n\u003ctr data-end=\"2049\" data-start=\"1981\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2001\" data-start=\"1981\"\u003ePart Number\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2049\" data-start=\"2001\"\u003e591578\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2133\" data-start=\"2050\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2070\" data-start=\"2050\"\u003eThread Size\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2133\" data-start=\"2070\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eM6 × 1.0 (35 mm length)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2213\" data-start=\"2134\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2154\" data-start=\"2134\"\u003eMaterial \/ Grade\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2213\" data-start=\"2154\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eGrade 8.8 high tensile steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2290\" data-start=\"2214\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2234\" data-start=\"2214\"\u003eFinish\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2290\" data-start=\"2234\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eZinc-Iron (ZnFe) white coating\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2377\" data-start=\"2291\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2311\" data-start=\"2291\"\u003eHead Type\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2377\" data-start=\"2311\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eFlanged hexagon head\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2441\" data-start=\"2378\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2398\" data-start=\"2378\"\u003eCompatible Models\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2441\" data-start=\"2398\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003eClassic 350, Classic 500 EFI, Bullet 350\/500, Thunderbird 350\/500 (export UCE models)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-end=\"2532\" data-start=\"2442\"\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2462\" data-start=\"2442\"\u003e\u003c\/td\u003e\n\u003ctd data-col-size=\"sm\" data-end=\"2532\" data-start=\"2462\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 data-end=\"2881\" data-start=\"2848\"\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cp data-end=\"3005\" data-start=\"2883\"\u003e\u003cstrong data-end=\"2922\" data-start=\"2883\"\u003eQ1: Which models use 591578\/A bolt?\u003c\/strong\u003e\u003cbr data-end=\"2925\" data-start=\"2922\"\u003e\u003cspan class=\"relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem] transition-colors duration-100 ease-in-out\"\u003e✅ Fits UCE-era export versions of Classic 350\/500, Bullet 350\/500, Thunderbird 350\/500—used for frame, mudguard, seat, exhaust attachments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-end=\"3146\" data-start=\"3007\"\u003e\u003cstrong data-end=\"3049\" data-start=\"3007\"\u003eQ2: What does ZnFe white coating mean?\u003c\/strong\u003e\u003cbr data-end=\"3052\" data-start=\"3049\"\u003e🧴 It's a zinc-iron electrocoat plating—providing enhanced rust protection over standard zinc.\u003c\/p\u003e\n\u003cp data-end=\"3301\" data-start=\"3148\"\u003e\u003cstrong data-end=\"3200\" data-start=\"3148\"\u003eQ3: Can this replace any M6×35 bolt in my frame?\u003c\/strong\u003e\u003cbr data-end=\"3203\" data-start=\"3200\"\u003e✅ Yes—where OEM spec matches (flange type, length, grade). Always verify torque rating is correct.\u003c\/p\u003e\n\u003cp data-end=\"3480\" data-start=\"3303\"\u003e\u003cstrong data-end=\"3357\" data-start=\"3303\"\u003eQ4: Should I replace more than one bolt at a time?\u003c\/strong\u003e\u003cbr data-end=\"3360\" data-start=\"3357\"\u003e🟢 Ideal to replace bolts in the same assembly together (e.g. seat mount, exhaust bracket) when one is worn or stripped.\u003c\/p\u003e\n\u003cp data-end=\"3585\" data-start=\"3482\"\u003e\u003cstrong data-end=\"3510\" data-start=\"3482\"\u003eQ5: Is this bolt metric?\u003c\/strong\u003e\u003cbr data-end=\"3513\" data-start=\"3510\"\u003e✅ Yes. Metric thread M6 × 1.0, 35 mm long, flange head, 8.8 grade steel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"UNDER THE HOOD","offers":[{"title":"Default Title","offer_id":49942976921895,"sku":"","price":149.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0878\/7447\/0183\/files\/8B22D91C-0F21-4F90-9334-6D133E0C9013.jpg?v=1745228623","url":"https:\/\/underthehood.co.in\/products\/royal-enfield-591578a-hex-flange-bolt-m6x35-classic-bullet-thunderbird","provider":"UNDER THE HOOD","version":"1.0","type":"link"}