{"product_id":"m6-m8-open-hook-eye-bolt-expansion-anchor-a4-stainless-steel","title":"M6 M8 Open Hook Eye Bolt Expansion Anchor — A4 Stainless Steel, Heavy Duty","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right size — M6 or M8?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"M6 (approximately 1\/4\\\" thread diameter) is generally suitable for lighter loads and smaller fixtures such as hanging planters, light chains, or cable guides. M8 (approximately 5\/16\\\" thread diameter) is typically chosen for heavier applications like swing sets, hammocks, or structural cable runs. Always check the load rating of your specific fixture and add a safety margin of at least 3:1.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What load can these open hook eye bolt expansion anchors support?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Working load capacity depends on the base material, embedment depth, and installation quality. In solid concrete, M6 expansion anchors typically support 150–300 lbs and M8 anchors typically support 300–600 lbs in shear or tension. Always consult a structural engineer for safety-critical applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these suitable for outdoor and marine environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. A4 stainless steel (equivalent to 316 grade) contains molybdenum, which provides superior resistance to chloride corrosion compared to standard A2\/304 stainless. These are generally well-suited for coastal, marine, and outdoor exposed applications.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What thread standard do these use — metric or imperial?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These use metric threads — M6 and M8. M6 is approximately equivalent to 1\/4\\\" UNC and M8 is approximately equivalent to 5\/16\\\" UNC, but they are not interchangeable with imperial threads. Ensure your mating hardware uses the same metric standard.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What base materials can these expansion anchors be installed into?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These open hook eye bolt expansion anchors are designed for solid masonry substrates including concrete, brick, and block. They are generally not recommended for hollow block, drywall, or soft materials without additional backing. Always pre-drill with the correct diameter masonry bit.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many pieces do I need to order for a typical project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"We offer 2-piece and 10-piece packs. The 2-piece option is ideal for single-point hanging applications like a porch swing or hammock. The 10-piece pack is cost-effective for projects requiring multiple anchor points, such as cable tray runs, garden wire systems, or multi-point rigging.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What drill bit size should I use for installation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For M6 expansion anchors, typically use a 6mm (15\/64\\\") masonry drill bit. For M8, typically use an 8mm (5\/16\\\") masonry bit. Always follow the specific installation instructions included with your anchors, as embedment depth requirements may vary.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003c!-- ① OVERVIEW --\u003e\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eOpen Hook Eye Bolt Expansion Anchors — Secure, Corrosion-Resistant Fixings for Concrete \u0026amp; Masonry\u003c\/h2\u003e\n    \u003cp\u003eWhether you're rigging a backyard hammock, running outdoor cable lines, or hanging heavy planters from a concrete ceiling, a weak anchor point is a liability you can't afford. These M6 and M8 open hook eye bolt expansion anchors give DIYers and contractors a reliable, corrosion-resistant fixing solution that holds firm in solid masonry — without the guesswork of toggle bolts or plastic plugs.\u003c\/p\u003e\n    \u003cp\u003eEach set is available in M6 (≈ 1\/4\" thread diameter) or M8 (≈ 5\/16\" thread diameter), in 2-piece or 10-piece packs. The anchors are manufactured from A4 stainless steel — the marine-grade alloy equivalent to 316 SS — featuring a molybdenum-enhanced composition that resists rust, salt spray, and chemical exposure far better than standard A2\/304 stainless. The open hook eye design allows quick attachment and detachment of carabiners, shackles, hooks, and wire rope clips without threading through a closed loop.\u003c\/p\u003e\n    \u003cp\u003eThese open hook eye bolt expansion anchors are a go-to choice for outdoor cable trellis systems, porch swing installations, concrete ceiling rigging, and marine dock hardware — anywhere you need a permanent, load-bearing anchor point that won't corrode over time.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ② COMPATIBILITY BAR --\u003e\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e\n    \u003cstrong\u003eCompatible with:\u003c\/strong\u003e Solid concrete, brick \u0026amp; block masonry  |  Metric M6 \u0026amp; M8 hardware  |  Carabiners, shackles, wire rope clips \u0026amp; eye hooks  |  Standard masonry drill bits (6mm \/ 8mm)\n  \u003c\/div\u003e\n\n  \u003c!-- ③ KEY FEATURES --\u003e\n  \u003ch2\u003e✅ Key Features of These Open Hook Eye Bolt Expansion Anchors\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🌊\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eA4 Marine-Grade Stainless Steel\u003c\/strong\u003e — Molybdenum-alloyed 316-equivalent composition resists chloride corrosion, making these anchors suitable for coastal, poolside, and outdoor exposed installations where standard stainless would pit and stain.\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🪝\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eOpen Hook Eye Design\u003c\/strong\u003e — The open-loop head allows fast clip-on attachment of carabiners, snap hooks, and shackles without threading hardware through a closed eye — ideal for rigging systems that need quick reconfiguration.\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eExpansion Anchor Mechanism\u003c\/strong\u003e — The sleeve-style expansion body grips the bore wall as the bolt is tightened, distributing load across the masonry and resisting pull-out forces in concrete and brick substrates.\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eTwo Metric Sizes Available\u003c\/strong\u003e — Choose M6 (≈ 1\/4\") for lighter-duty hanging applications or M8 (≈ 5\/16\") for heavier structural loads — both use standard metric masonry drill bits for straightforward installation.\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in 2-piece packs for single-point projects (hammocks, swings) or 10-piece packs for multi-anchor installations like cable trellis systems, wire rope runs, and rigging grids.\u003c\/span\u003e\n    \u003c\/li\u003e\n    \u003cli\u003e\n      \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n      \u003cspan\u003e\u003cstrong\u003eTool-Friendly Installation\u003c\/strong\u003e — Installs with a standard masonry drill and wrench — no specialty tools required. The hex or slotted drive (see variant details) allows controlled torque application for consistent anchor expansion.\u003c\/span\u003e\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003c!-- ④ TECHNICAL SPECIFICATIONS --\u003e\n  \u003ch2\u003e📐 Technical Specifications — Open Hook Eye Bolt Expansion Anchors\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eA4 Stainless Steel (316-equivalent, molybdenum-alloyed)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Sizes Available\u003c\/th\u003e\n\u003ctd\u003eM6 (≈ 1\/4\") \u0026amp; M8 (≈ 5\/16\")\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Type\u003c\/th\u003e\n\u003ctd\u003eOpen Hook Eye\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAnchor Type\u003c\/th\u003e\n\u003ctd\u003eSleeve expansion anchor\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSuitable Base Materials\u003c\/th\u003e\n\u003ctd\u003eSolid concrete, brick, block masonry\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Drill Bit (M6)\u003c\/th\u003e\n\u003ctd\u003e6mm (15\/64\") masonry bit\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Drill Bit (M8)\u003c\/th\u003e\n\u003ctd\u003e8mm (5\/16\") masonry bit\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eMetric (ISO)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBrushed \/ natural stainless (see variant images)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e2 Pcs \/ 10 Pcs (select above)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eEmbedment Depth\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWorking Load (indicative)\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm for your specific application\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCorrosion Rating\u003c\/th\u003e\n\u003ctd\u003eA4 \/ 316 SS — suitable for marine \u0026amp; outdoor use\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-note\"\u003e\n    \u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e\n    \u003cstrong\u003eHeads up:\u003c\/strong\u003e Embedment depth and exact shank length vary by variant. If you need confirmed load ratings or dimensions for a structural application, please contact us before ordering.\n  \u003c\/div\u003e\n\n  \u003c!-- ⑤ FAQ --\u003e\n  \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right size — M6 or M8?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eM6 (approximately 1\/4\" thread diameter) is generally suitable for lighter loads and smaller fixtures such as hanging planters, light chains, or cable guides. M8 (approximately 5\/16\" thread diameter) is typically chosen for heavier applications like swing sets, hammocks, or structural cable runs. Always check the load rating of your specific fixture and add a safety margin of at least 3:1.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat load can these open hook eye bolt expansion anchors support?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWorking load capacity depends on the base material, embedment depth, and installation quality. In solid concrete, M6 expansion anchors typically support 150–300 lbs and M8 anchors typically support 300–600 lbs in shear or tension. Always consult a structural engineer for safety-critical applications and never exceed the rated working load.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these suitable for outdoor and marine environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eYes. A4 stainless steel (equivalent to 316 grade) contains molybdenum, which provides superior resistance to chloride corrosion compared to standard A2\/304 stainless. These are generally well-suited for coastal, marine, poolside, and outdoor exposed applications where long-term rust resistance is essential.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat thread standard do these use — metric or imperial?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese use metric threads — M6 and M8. M6 is approximately equivalent to 1\/4\" UNC and M8 is approximately equivalent to 5\/16\" UNC, but they are \u003cstrong\u003enot interchangeable\u003c\/strong\u003e with imperial threads. Ensure your mating hardware (carabiners, shackles, nuts) uses the same metric standard to avoid cross-threading.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat base materials can these expansion anchors be installed into?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eThese open hook eye bolt expansion anchors are designed for solid masonry substrates including concrete, brick, and block. They are generally not recommended for hollow block, drywall, or soft materials without additional backing. Always pre-drill with the correct diameter masonry bit and ensure the hole is clean and free of debris before insertion.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow many pieces do I need for a typical project?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eWe offer 2-piece and 10-piece packs. The 2-piece option is ideal for single-point hanging applications like a porch swing or hammock. The 10-piece pack is cost-effective for projects requiring multiple anchor points, such as cable tray runs, garden wire trellis systems, or multi-point rigging setups.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat drill bit size should I use for installation?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\n        \u003cp\u003eFor M6 expansion anchors, typically use a 6mm (15\/64\") masonry drill bit. For M8, typically use an 8mm (5\/16\") masonry bit. Drill to the required embedment depth, clear the hole of dust, insert the anchor, and tighten until the sleeve expands fully against the bore wall. Always follow the specific installation instructions included with your anchors.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- ⑥ CTA BAR --\u003e\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M6 \/ 10Pcs","offer_id":52308986724626,"sku":"FXLGB05837x10","price":28.55,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 10Pcs","offer_id":52308986757394,"sku":"FXLGB05838x10","price":52.21,"currency_code":"USD","in_stock":true},{"title":"M6 \/ 2Pcs","offer_id":52308986790162,"sku":"FXLGB05837x2","price":6.73,"currency_code":"USD","in_stock":true},{"title":"M8 \/ 2Pcs","offer_id":52308986822930,"sku":"FXLGB05838x2","price":11.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_5eee4350-dcbf-407b-9e83-8b3f6a913d2b.jpg?v=1780140511","url":"https:\/\/homediyer.com\/products\/m6-m8-open-hook-eye-bolt-expansion-anchor-a4-stainless-steel","provider":"HomeDIYer","version":"1.0","type":"link"}