{"product_id":"products-304-stainless-steel-cap-nuts-m3-m12","title":"304 Stainless Steel Cap Nuts – Acorn Nuts for M3 to M12 Screws (Decorative \u0026 Protective)","description":"\u003cstyle\u003e\n  \/* 所有样式使用 .hdiy- 前缀，避免与商店主题冲突 *\/\n  .hdiy-capnut-container {\n    max-width: 100%;\n    margin: 0 auto;\n    padding: 0;\n    background: transparent;\n    color: #1a1a1a;\n    line-height: 1.5;\n  }\n  .hdiy-section {\n    margin-bottom: 2rem;\n    padding: 0 1rem;\n  }\n  .hdiy-section h2 {\n    font-size: 1.8rem;\n    font-weight: 600;\n    margin-bottom: 1rem;\n    border-left: 4px solid #4a7c59;\n    padding-left: 1rem;\n  }\n  .hdiy-section h3 {\n    font-size: 1.4rem;\n    font-weight: 600;\n    margin: 1rem 0 0.75rem;\n  }\n  .hdiy-feature-list {\n    list-style: none;\n    padding: 0;\n    margin: 0;\n  }\n  .hdiy-feature-list li {\n    position: relative;\n    padding-left: 1.8rem;\n    margin-bottom: 0.9rem;\n    font-size: 1rem;\n  }\n  .hdiy-feature-list li::before {\n    content: \"✔️\";\n    position: absolute;\n    left: 0;\n    top: 0;\n    color: #4a7c59;\n  }\n  .hdiy-table-wrapper {\n    overflow-x: auto;\n    margin: 1rem 0;\n    border-radius: 8px;\n    border: 1px solid #e2e8f0;\n  }\n  .hdiy-table-wrapper table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.9rem;\n    min-width: 400px;\n  }\n  .hdiy-table-wrapper th,\n  .hdiy-table-wrapper td {\n    border: 1px solid #e2e8f0;\n    padding: 0.75rem;\n    text-align: left;\n    vertical-align: top;\n  }\n  .hdiy-table-wrapper th {\n    background-color: #f7fafc;\n    font-weight: 600;\n    width: 30%;\n  }\n  .hdiy-faq-item {\n    margin-bottom: 1.25rem;\n    border-bottom: 1px solid #edf2f7;\n    padding-bottom: 1rem;\n  }\n  .hdiy-faq-question {\n    font-weight: 700;\n    font-size: 1.05rem;\n    margin-bottom: 0.4rem;\n    display: flex;\n    align-items: center;\n    gap: 0.5rem;\n  }\n  .hdiy-faq-question:before {\n    content: \"❓\";\n    font-size: 1rem;\n  }\n  .hdiy-faq-answer {\n    color: #2d3748;\n    margin-left: 1.8rem;\n    font-size: 0.95rem;\n  }\n  @media (max-width: 640px) {\n    .hdiy-section {\n      padding: 0 0.75rem;\n    }\n    .hdiy-section h2 {\n      font-size: 1.5rem;\n    }\n    .hdiy-faq-question {\n      font-size: 1rem;\n    }\n  }\n  .hdiy-note {\n    background: #fef9e6;\n    padding: 0.75rem 1rem;\n    border-left: 4px solid #e6b422;\n    margin: 1rem 0;\n    font-size: 0.9rem;\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hdiy-capnut-container\"\u003e\n\u003c!-- 产品概述 --\u003e\n\u003cdiv class=\"hdiy-section\"\u003e\n\u003ch2\u003e🔩 304 Stainless Steel Cap Nuts – Decorative Acorn Nuts for M3 to M12 Screws\u003c\/h2\u003e\n\u003cp\u003eGive your bolts a clean, finished look while protecting exposed threads from damage. These 304 stainless steel cap nuts (also called acorn nuts or dome nuts) slide over the end of a screw or bolt, hiding sharp edges and adding a polished, professional appearance. Made from high‑grade 304 stainless, they resist rust, corrosion, and daily wear — perfect for home furniture, outdoor equipment, automotive projects, and even marine applications. Available in metric sizes M3, M4, M5, M6, M8, M10, and M12. Whether you’re building a custom shelf, repairing a motorcycle, or finishing a food‑grade machine, these cap nuts deliver both function and style.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 产品特点 --\u003e\n\u003cdiv class=\"hdiy-section\"\u003e\n\u003ch2\u003e✨ Why Choose These 304 Stainless Steel Cap Nuts\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePremium 304 stainless steel\u003c\/strong\u003e – Excellent corrosion resistance, rust‑proof, and durable. Holds its bright finish even in humid or outdoor environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFine threading \u0026amp; smooth surface\u003c\/strong\u003e – Deep, uniform threads ensure a snug fit without cross‑threading. No burrs or sharp edges – safe to touch.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDecorative acorn shape\u003c\/strong\u003e – The domed top covers the end of the bolt completely, preventing snagged clothing or scratched surfaces. Adds a clean, professional look to any project.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWide size range (M3 to M12)\u003c\/strong\u003e – Covers small electronics (M3) up to heavy‑duty machinery (M12). Each size matches standard metric screw threads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEasy to install \u0026amp; remove\u003c\/strong\u003e – Use a standard wrench or socket. The hex base provides a solid grip without damaging the finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMulti‑industry application\u003c\/strong\u003e – Works for home decoration, furniture assembly, medical equipment, vehicle parts, boat accessories, industrial machinery, and food processing equipment.\u003c\/p\u003e\n\u003cdiv class=\"hdiy-note\"\u003e💡 \u003cstrong\u003ePro tip:\u003c\/strong\u003e Use these cap nuts on exposed bolts for a child‑safe finish (no sharp threads sticking out). Also great for covering threaded rod ends on custom furniture or gym equipment.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- 规格参数表格 --\u003e\n\u003cdiv class=\"hdiy-section\"\u003e\n\u003ch2\u003e📏 Specifications – 304 Stainless Steel Cap Nuts\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrapper\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel (rust‑resistant, food‑grade compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAcorn nut \/ cap nut \/ dome nut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThread Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetric fine\/coarse (standard M thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Sizes (Thread Diameter)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM3, M4, M5, M6, M8, M10, M12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBright, clean, smooth – no plating needed (natural stainless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHex Drive Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard metric wrench sizes (varies by M size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHome decor, furniture, medical devices, vehicle \u0026amp; marine parts, industrial equipment, food industry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cem\u003e📌 Note: Pictures are for reference only. Actual product dimensions and printing may vary slightly. M3 refers to 3mm inner thread diameter, etc.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- 常见问题 FAQ --\u003e\n\u003cdiv class=\"hdiy-section\"\u003e\n\u003ch2\u003e💬 Frequently Asked Questions – Stainless Steel Cap Nuts\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eAre these cap nuts compatible with standard metric bolts?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eYes – M3 to M12 sizes match standard metric coarse threads. For example, an M6 cap nut fits any standard M6 bolt or threaded rod. Fine thread versions are not included; please verify your bolt’s thread pitch if you have a non‑standard fine thread application.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eWill 304 stainless steel rust over time?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003e304 stainless is highly corrosion‑resistant for most indoor and outdoor use. It can develop minor surface discoloration in very salty coastal environments or prolonged contact with chlorides (like pool chemicals). For marine or extreme saltwater use, consider 316 stainless. But for everyday furniture, automotive, and workshop use, 304 is more than enough.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eWhat’s the difference between a cap nut and a regular hex nut?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eA cap nut has a closed, domed end that covers the bolt tip. A regular hex nut is open on both ends. The cap protects threads from damage, prevents snagging on clothing or skin, and gives a finished look. It’s also called an “acorn nut” because of its shape.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eCan I use these in food processing equipment?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eYes – 304 stainless steel is commonly used in food industry applications because it resists corrosion and is easy to clean. The smooth, burr‑free surface also prevents bacteria traps. However, always follow local sanitation guidelines and verify that all components (including thread lubricants) are food‑safe.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eDo I need a washer under the cap nut?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eNot necessarily – cap nuts can be used directly on a bolted joint. However, adding a flat washer distributes clamping force and protects the surface underneath. For vibration‑prone applications, consider a lock washer between the cap nut and the work surface.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003eWhat size wrench do I need for M3\/M4\/M5\/etc.?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eTypical hex sizes: M3 uses 5.5mm wrench, M4 uses 7mm, M5 uses 8mm, M6 uses 10mm, M8 uses 13mm, M10 uses 16mm, M12 uses 18mm. Always check actual nut flats, but these are standard.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3 \/ 5 Pcs","offer_id":52253537665298,"sku":"GLFBBYWHK-KCSJ0008x5","price":6.5,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 10 Pcs","offer_id":52253537698066,"sku":"GLFBBYWHK-KCSJ0008x10","price":7.44,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 20 Pcs","offer_id":52253537730834,"sku":"GLFBBYWHK-KCSJ0008x20","price":9.29,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 25 Pcs","offer_id":52253537763602,"sku":"GLFBBYWHK-KCSJ0008x25","price":10.21,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 30 Pcs","offer_id":52253537796370,"sku":"GLFBBYWHK-KCSJ0008x30","price":11.14,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 50 Pcs","offer_id":52253537829138,"sku":"GLFBBYWHK-KCSJ0008x50","price":12.28,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 100 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