{"product_id":"grade-10-9-high-tensile-flanged-button-head-screws-allen-socket-bolts-m3-to-m8-iso7380-2","title":"Grade 10.9 High Tensile Flanged Button Head Screws – Allen Socket Bolts M3 to M8 | ISO7380-2","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=yes\" name=\"viewport\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n \/* ========================\n Prefix: hd-hbfs- (prevents theme conflicts)\n Encapsulated styles for Shopify product description\n ======================== *\/\n .hd-hbfs-wrapper {\n width: 100%;\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, Helvetica, Arial, sans-serif;\n color: #1a1a1a;\n line-height: 1.5;\n background: transparent;\n }\n .hd-hbfs-wrapper *,\n .hd-hbfs-wrapper *::before,\n .hd-hbfs-wrapper *::after {\n box-sizing: inherit;\n }\n .hd-hbfs-container {\n max-width: 1400px;\n margin: 0 auto;\n padding: 1.5rem 1rem;\n background: #ffffff;\n }\n \/* Typography *\/\n .hd-hbfs-title {\n font-size: 1.9rem;\n font-weight: 600;\n margin: 0 0 0.5rem 0;\n letter-spacing: -0.01em;\n line-height: 1.2;\n color: #0a0a0a;\n }\n .hd-hbfs-brand {\n font-size: 1rem;\n color: #2c7da0;\n margin-bottom: 1rem;\n font-weight: 500;\n display: inline-block;\n background: #eef4fc;\n padding: 0.2rem 0.8rem;\n border-radius: 30px;\n }\n .hd-hbfs-section-title {\n font-size: 1.6rem;\n font-weight: 600;\n margin: 1.8rem 0 1rem 0;\n padding-bottom: 0.5rem;\n border-bottom: 3px solid #2c7da0;\n display: inline-block;\n color: #0b3b4f;\n }\n .hd-hbfs-description {\n font-size: 1rem;\n margin: 1rem 0 1.2rem;\n color: #2c2c2c;\n }\n \/* Features list - vertical layout (SEO friendly) *\/\n .hd-hbfs-features-list {\n list-style: none;\n padding: 0;\n margin: 1.2rem 0 1.8rem;\n }\n .hd-hbfs-features-list li {\n padding: 0.75rem 0 0.75rem 1.8rem;\n position: relative;\n font-size: 1rem;\n border-bottom: 1px solid #f0f0f0;\n }\n .hd-hbfs-features-list li:last-child {\n border-bottom: none;\n }\n .hd-hbfs-features-list li::before {\n content: \"✅\";\n position: absolute;\n left: 0;\n top: 0.75rem;\n font-size: 1rem;\n }\n \/* Table styles *\/\n .hd-hbfs-table-wrapper {\n overflow-x: auto;\n margin: 1.5rem 0 1rem;\n border-radius: 16px;\n border: 1px solid #e2e8f0;\n background: #ffffff;\n }\n .hd-hbfs-specs-table {\n width: 100%;\n border-collapse: collapse;\n font-size: 0.9rem;\n min-width: 450px;\n }\n .hd-hbfs-specs-table th,\n .hd-hbfs-specs-table td {\n padding: 0.9rem 0.8rem;\n text-align: left;\n border-bottom: 1px solid #e9ecef;\n }\n .hd-hbfs-specs-table th {\n background-color: #f1f9fe;\n font-weight: 700;\n color: #0b3b4f;\n font-size: 0.9rem;\n }\n .hd-hbfs-specs-table tr:last-child td {\n border-bottom: none;\n }\n .hd-hbfs-note {\n background: #f8fafc;\n padding: 0.8rem 1rem;\n border-radius: 12px;\n font-size: 0.85rem;\n color: #2c5a74;\n margin: 0.8rem 0 1rem;\n border-left: 4px solid #2c7da0;\n }\n \/* FAQ section - fully expanded, no accordion *\/\n .hd-hbfs-faq-item {\n margin-bottom: 1.5rem;\n border-bottom: 1px solid #e9ecef;\n padding-bottom: 1.2rem;\n }\n .hd-hbfs-faq-question {\n font-weight: 700;\n font-size: 1.05rem;\n margin: 0 0 0.5rem 0;\n color: #0f4c5f;\n display: flex;\n align-items: center;\n gap: 8px;\n }\n .hd-hbfs-faq-question::before {\n content: \"⚙️\";\n font-size: 1.1rem;\n }\n .hd-hbfs-faq-answer {\n font-size: 0.95rem;\n color: #2d3e50;\n line-height: 1.5;\n margin-left: 1.2rem;\n }\n \/* Responsive *\/\n @media (max-width: 768px) {\n .hd-hbfs-container {\n padding: 1rem 0.9rem;\n }\n .hd-hbfs-title {\n font-size: 1.6rem;\n }\n .hd-hbfs-section-title {\n font-size: 1.4rem;\n }\n .hd-hbfs-specs-table th,\n .hd-hbfs-specs-table td {\n padding: 0.7rem 0.5rem;\n font-size: 0.8rem;\n }\n }\n .hd-hbfs-divider {\n height: 1px;\n background: #e9ecef;\n margin: 1.5rem 0;\n }\n .hd-hbfs-text-small {\n font-size: 0.85rem;\n color: #5a6874;\n }\n \u003c\/style\u003e\n\u003cdiv class=\"hd-hbfs-wrapper\"\u003e\n\u003cdiv class=\"hd-hbfs-container\"\u003e\n\u003c!-- Product title (customer-facing) --\u003e\n\u003ch1 class=\"hd-hbfs-title\"\u003e🔩 Grade 10.9 High Tensile Flanged Button Head Screws – Allen Socket Bolts M3 to M8 | ISO7380-2\u003c\/h1\u003e\n\u003cdiv class=\"hd-hbfs-brand\"\u003e🏷️ Brand: HomeDIYer Fastener | ISO7380-2 | Grade 10.9 Steel | Black Uncoated | Hex Bits Included\u003c\/div\u003e\n\u003c!-- Product Overview: natural, problem-solving tone --\u003e\n\u003cdiv class=\"hd-hbfs-description\"\u003e\n\u003cstrong\u003e📌 Overview — High-strength fastening with a clean, washer-free finish.\u003c\/strong\u003e When you need serious clamping force and a professional appearance, upgrade to \u003cstrong\u003eGrade 10.9 High Tensile Flanged Button Head Screws\u003c\/strong\u003e. With a tensile strength of 1040 MPa (151,000 psi), these ISO7380-2 fasteners are significantly stronger than standard stainless steel or Grade 8.8 hardware. The integrated flange eliminates the need for separate washers, distributing load evenly and protecting your work surface. The low-profile button head and hex socket drive allow high torque application without slipping, making them ideal for heavy machinery, automotive components, industrial equipment, and structural assemblies. Fully threaded from M3 to M8, with a black self-color (uncoated) finish. Each order includes the correct hex screwdriver bits. Choose your length and quantity – built for demanding applications where failure is not an option.\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-description\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/KAY017_6.jpg?v=1776762553\" alt=\"\"\u003e\u003c\/div\u003e\n\u003c!-- Features: vertical list for SEO \u0026 readability --\u003e\n\u003ch2 class=\"hd-hbfs-section-title\"\u003e✨ Key Features – Grade 10.9 Flanged Button Head Socket Screws\u003c\/h2\u003e\n\u003cul class=\"hd-hbfs-features-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 10.9 High Tensile Alloy Steel\u003c\/strong\u003e – 1040 MPa tensile strength, 900 MPa yield strength – ideal for high-stress applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Wide Flange\u003c\/strong\u003e – Eliminates the need for a separate washer; distributes clamping load and protects the work surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Button Head\u003c\/strong\u003e – Sleek domed appearance, snag-free, and perfect for visible assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Socket Drive (Allen Key)\u003c\/strong\u003e – Enables high torque transmission without cam-out; hex bits included (2mm to 5mm).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Threaded Design\u003c\/strong\u003e – Maximum grip strength and versatility; length measured from under the head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eISO7380-2 Standard\u003c\/strong\u003e – Precision dimensions for reliable fit with metric nuts and tapped holes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack Self-Color (Uncoated) Finish\u003c\/strong\u003e – Natural steel with light oil for storage; suitable for dry or oil-lubricated environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/KAY017_8.jpg?v=1776762553\" alt=\"\"\u003e\u003c\/p\u003e\n\u003c!-- Specifications Table: detailed dimensions --\u003e\n\u003ch2 class=\"hd-hbfs-section-title\"\u003e📏 Technical Specifications – Flanged Button Head Screws (ISO7380-2, Metric Coarse)\u003c\/h2\u003e\n\u003cdiv class=\"hd-hbfs-table-wrapper\"\u003e\n\u003ctable class=\"hd-hbfs-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Size\u003c\/th\u003e\n\u003cth\u003eThread Pitch (mm)\u003c\/th\u003e\n\u003cth\u003eHead Diameter (mm)\u003c\/th\u003e\n\u003cth\u003eHead Height (mm)\u003c\/th\u003e\n\u003cth\u003eAllen Key Size (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.50\u003c\/td\u003e\n\u003ctd\u003e6.9\u003c\/td\u003e\n\u003ctd\u003e1.65\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.70\u003c\/td\u003e\n\u003ctd\u003e9.4\u003c\/td\u003e\n\u003ctd\u003e2.2\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.80\u003c\/td\u003e\n\u003ctd\u003e11.8\u003c\/td\u003e\n\u003ctd\u003e2.8\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.00\u003c\/td\u003e\n\u003ctd\u003e13.6\u003c\/td\u003e\n\u003ctd\u003e3.3\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e17.6\u003c\/td\u003e\n\u003ctd\u003e4.4\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-note\"\u003e💡 \u003cstrong\u003eLength \u0026amp; ordering info:\u003c\/strong\u003e Screws are \u003cstrong\u003efully threaded\u003c\/strong\u003e. Length is measured from the underside of the head (does not include head height). \u003cstrong\u003eChoose your preferred length\u003c\/strong\u003e (e.g., 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm) — sold as per your requirement. \u003cstrong\u003eHex bits are included\u003c\/strong\u003e with your order.\u003c\/div\u003e\n\u003c!-- Additional note on material and corrosion --\u003e\n\u003cdiv class=\"hd-hbfs-note\" style=\"background: #fef9e6; border-left-color: #e6a017;\"\u003e⚠️ \u003cstrong\u003eMaterial note:\u003c\/strong\u003e Grade 10.9 steel offers exceptional strength but is not corrosion-resistant. The black uncoated finish has light oil to prevent rust during storage. For indoor, dry, or oil-lubricated applications (engines, machinery, tooling), these are ideal. For outdoor or wet environments, use stainless steel or apply a protective coating.\u003c\/div\u003e\n\u003c!-- FAQ section (expanded, no accordion) --\u003e\n\u003ch2 class=\"hd-hbfs-section-title\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/KAY017_7.jpg?v=1776762553\" alt=\"\"\u003e❓ Frequently Asked Questions – Grade 10.9 Flanged Button Head Screws\u003c\/h2\u003e\n\u003cdiv class=\"hd-hbfs-faq-item\"\u003e\n\u003cdiv class=\"hd-hbfs-faq-question\"\u003eHow strong is Grade 10.9 compared to other grades?\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-answer\"\u003e📊 Grade 10.9 has a minimum tensile strength of 1040 MPa (151,000 psi) and a yield strength of 900 MPa. For comparison: Grade 8.8 is 800 MPa, A2-70 stainless is 700 MPa. These are excellent for high-stress bolted joints in machinery, automotive, and structural applications.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-item\"\u003e\n\u003cdiv class=\"hd-hbfs-faq-question\"\u003eDo I need a washer with these flanged screws?\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-answer\"\u003e🔧 No. The integrated wide flange replaces a standard flat washer, distributing load and protecting the work surface. This saves time, reduces parts, and prevents washer loss.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-item\"\u003e\n\u003cdiv class=\"hd-hbfs-faq-question\"\u003eAre these screws fully threaded? What lengths are available?\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-answer\"\u003e✅ Yes, all sizes are fully threaded for maximum grip. Lengths measured from under the head. Common lengths from 6mm to 50mm. Custom lengths available for bulk orders – contact us.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-item\"\u003e\n\u003cdiv class=\"hd-hbfs-faq-question\"\u003eDo you include the hex bits? What sizes?\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-answer\"\u003e🔩 Yes, the box includes the correct hex (Allen) bits: M3 → 2mm, M4 → 2.5mm, M5 → 3mm, M6 → 4mm, M8 → 5mm. You'll have everything needed to install them right away.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-item\"\u003e\n\u003cdiv class=\"hd-hbfs-faq-question\"\u003eWill these screws rust? Are they suitable for outdoor use?\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-faq-answer\"\u003e🌧️ Grade 10.9 steel is not stainless – it will rust if exposed to moisture. The black uncoated finish has light oil for storage, but for outdoor or wet environments, we recommend applying a rust-preventative coating (paint, zinc spray) or switching to A2\/A4 stainless steel flanged button heads. These are best for dry, indoor, or oil-wetted applications.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-divider\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"hd-hbfs-text-small\" style=\"text-align: center; margin-top: 1rem;\"\u003e⚙️ \u003cstrong\u003eHomeDIYer Fastener\u003c\/strong\u003e — High-strength fasteners for demanding applications. Order your exact size, length, and quantity today.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3 \/ 6mm \/ 100","offer_id":52196976918802,"sku":"KAYFST017-1","price":6.6,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 10mm \/ 100","offer_id":52196976951570,"sku":"KAYFST017-2","price":6.9,"currency_code":"USD","in_stock":true},{"title":"M4 \/ 8mm \/ 100","offer_id":52196976984338,"sku":"KAYFST017-3","price":7.14,"currency_code":"USD","in_stock":true},{"title":"M4 \/ 12mm \/ 100","offer_id":52196977017106,"sku":"KAYFST017-4","price":7.44,"currency_code":"USD","in_stock":true},{"title":"M5 \/ 10mm \/ 100","offer_id":52196977049874,"sku":"KAYFST017-5","price":7.5,"currency_code":"USD","in_stock":true},{"title":"M5 \/ 12mm \/ 100","offer_id":52196977082642,"sku":"KAYFST017-6","price":7.8,"currency_code":"USD","in_stock":true},{"title":"M5 \/ 16mm \/ 100","offer_id":52196977115410,"sku":"KAYFST017-7","price":8.1,"currency_code":"USD","in_stock":true},{"title":"M5 \/ 20mm \/ 100","offer_id":52196977148178,"sku":"KAYFST017-8","price":8.4,"currency_code":"USD","in_stock":true},{"title":"M5 \/ 25mm \/ 100","offer_id":52196977180946,"sku":"KAYFST017-9","price":8.7,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 10mm \/ 100","offer_id":52196977213714,"sku":"KAYFST017-10","price":8.4,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 16mm \/ 100","offer_id":52196977246482,"sku":"KAYFST017-11","price":8.94,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 20mm \/ 100","offer_id":52196977279250,"sku":"KAYFST017-12","price":9.24,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 25mm \/ 80","offer_id":52196977312018,"sku":"KAYFST017-13","price":9.12,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 30mm \/ 50","offer_id":52196977344786,"sku":"KAYFST017-14","price":7.95,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 12mm \/ 50","offer_id":52196977377554,"sku":"KAYFST017-15","price":8.55,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 16mm \/ 50","offer_id":52196977410322,"sku":"KAYFST017-16","price":8.85,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 20mm \/ 50","offer_id":52196977443090,"sku":"KAYFST017-17","price":9.39,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 25mm \/ 40","offer_id":52196977475858,"sku":"KAYFST017-18","price":9.0,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 30mm \/ 30","offer_id":52196977508626,"sku":"KAYFST017-19","price":8.25,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 40mm \/ 20","offer_id":52196977541394,"sku":"KAYFST017-20","price":7.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/017.jpg?v=1776762553","url":"https:\/\/homediyer.com\/products\/grade-10-9-high-tensile-flanged-button-head-screws-allen-socket-bolts-m3-to-m8-iso7380-2","provider":"HomeDIYer","version":"1.0","type":"link"}