{"product_id":"brass-ball-cap-nuts-m3-m12","title":"Brass Ball Cap Nuts – Lamp Finial Screw Caps, Female Thread M3 to M12, Ball Diameter 6–25mm","description":"\u003cstyle\u003e\n  .hdiy-product-section {\n    max-width: 100%;\n    margin: 0;\n    padding: 0;\n    box-sizing: border-box;\n  }\n  .hdiy-product-section * {\n    box-sizing: border-box;\n  }\n  .hdiy-heading {\n    font-size: 1.75rem;\n    font-weight: 600;\n    margin: 1.5rem 0 0.75rem 0;\n    padding-bottom: 0.5rem;\n    border-bottom: 2px solid #e2e2e2;\n  }\n  .hdiy-subheading {\n    font-size: 1.25rem;\n    font-weight: 600;\n    margin: 1.25rem 0 0.75rem 0;\n  }\n  .hdiy-paragraph {\n    margin: 0 0 1rem 0;\n    line-height: 1.5;\n  }\n  .hdiy-feature-list {\n    list-style: disc;\n    margin: 0 0 1.5rem 1.5rem;\n    padding: 0;\n  }\n  .hdiy-feature-list li {\n    margin-bottom: 0.5rem;\n    line-height: 1.4;\n    padding-left: 0;\n  }\n  .hdiy-table-wrapper {\n    overflow-x: auto;\n    margin: 1rem 0 1.5rem 0;\n  }\n  .hdiy-specs-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.9rem;\n    min-width: 300px;\n  }\n  .hdiy-specs-table th,\n  .hdiy-specs-table td {\n    border: 1px solid #ddd;\n    padding: 0.6rem 0.8rem;\n    text-align: left;\n    vertical-align: top;\n  }\n  .hdiy-specs-table th {\n    background-color: #f5f5f5;\n    font-weight: 600;\n    width: 35%;\n  }\n  .hdiy-faq-item {\n    margin-bottom: 1.25rem;\n  }\n  .hdiy-faq-question {\n    font-weight: 600;\n    margin: 0 0 0.25rem 0;\n    font-size: 1rem;\n  }\n  .hdiy-faq-answer {\n    margin: 0 0 0.5rem 0;\n    line-height: 1.5;\n  }\n  @media (max-width: 480px) {\n    .hdiy-specs-table th,\n    .hdiy-specs-table td {\n      padding: 0.5rem;\n    }\n    .hdiy-feature-list {\n      margin-left: 1.2rem;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hdiy-product-section\"\u003e\n\u003c!-- Overview --\u003e\n\u003ch2 class=\"hdiy-heading\"\u003e🔩 Brass Ball Cap Nuts – Lamp Finial Screw Caps (Female Thread M3–M12, Ball Dia 6–25mm)\u003c\/h2\u003e\n\u003cp class=\"hdiy-paragraph\"\u003eIf you’re restoring an old chandelier, building a custom table lamp, or just need a classy way to cap a threaded rod, these \u003cstrong\u003ebrass ball cap nuts\u003c\/strong\u003e are a simple upgrade. They screw onto male threads (M3 to M12) and cover the end with a polished brass ball. No more exposed nut or ugly acorn cap – the rounded shape looks like a tiny decorative finial. I’ve used them on lamp harp assemblies, furniture legs, and even as drawer pulls. Ball diameters range from 6mm (small and subtle) up to 25mm (bold and weighty). Solid brass, no plating to chip. Just warm, natural metal that ages gracefully.\u003c\/p\u003e\n\u003c!-- Features --\u003e\n\u003ch2 class=\"hdiy-heading\"\u003e✨ Why These Threaded Brass Ball Caps Belong in Your Workshop\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e💡 Perfect for lamps \u0026amp; chandeliers\u003c\/strong\u003e – Screws onto the top of a lamp harp or the end of a threaded rod to secure the shade and add a decorative finish. A true \u003cstrong\u003elamp finial screw cap\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e🔩 Female threads M3 to M12\u003c\/strong\u003e – M3, M4, M5, M6, M10, and M12. Match the thread to your rod or stud. The internal thread depth is proportional to the ball size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e🎾 Ball diameters from 6mm to 25mm\u003c\/strong\u003e – Choose 6mm, 8mm, 10mm, 12mm, 15mm, 16mm, 17.5mm, 20mm, 21.5mm, or 25mm. Smaller for delicate fixtures, larger for substantial furniture or heavy lamps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e🟤 Solid brass construction – no plating\u003c\/strong\u003e – Raw brass has a warm, golden tone that darkens nicely over time. No cheap zinc or plastic. Polishes easily if you want to keep it shiny.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e🛠️ Multi‑purpose: furniture, knobs, finials\u003c\/strong\u003e – Use as a decorative cap on exposed bolts, a handle for small drawers, a foot for a metal stand, or a final touch on a custom metalwork project.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e📐 Precise metric threads\u003c\/strong\u003e – Cleanly cut, consistent pitch. Screws on smoothly without cross‑threading. Refer to the attached parameter diagram for exact thread length and ball dimensions per size.\u003c\/p\u003e\n\u003c!-- Specifications Table --\u003e\n\u003ch2 class=\"hdiy-heading\"\u003e📏 Technical Specifications – Brass Ball Cap Nuts\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrapper\"\u003e\n\u003ctable class=\"hdiy-specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eBrass ball cap nut \/ lamp finial \/ female screw cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSolid brass (unplated, natural finish)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShape\u003c\/th\u003e\n\u003ctd\u003eRound ball\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBall Diameter Options\u003c\/th\u003e\n\u003ctd\u003e6mm, 8mm, 10mm, 12mm, 15mm, 16mm, 17.5mm, 20mm, 21.5mm, 25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFemale Thread Sizes\u003c\/th\u003e\n\u003ctd\u003eM3, M4, M5, M6, M10, M12 (metric coarse thread)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eLamp finials, chandelier caps, furniture knobs, decorative bolt covers, drawer pulls, metalwork accents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003ctd\u003eStandard metric coarse pitch (e.g., M6 = 1.0mm) – consult size diagram for exact values\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ --\u003e\n\u003ch2 class=\"hdiy-heading\"\u003e❓ Frequently Asked Questions – Brass Ball Cap Nuts\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003e💡 Will these fit a standard lamp harp? What thread size do I need?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eMost table lamp harps use a 1\/4\"-27 thread (UNS), not metric. However, many imported lamps and custom builds use M4, M5, or M6. Measure the threaded stud on your lamp. If it’s about 5mm diameter with fine threads, it’s likely M5 or M6. For vintage US lamps, you may need a thread adapter. Our M6 cap fits snugly on 6mm metric rod. When in doubt, order a few sizes to test.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003e🔩 Do these caps come with a set screw or just a blind hole?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eThey are female threaded caps – a blind threaded hole inside the ball. You screw the cap onto the male thread until it tightens against the shoulder or the end of the rod. No set screw needed. For permanent mounting, you can add a drop of threadlocker. For occasional adjustment, hand-tight is usually enough.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003e🟤 Will raw brass tarnish? How do I clean it?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eYes, unfinished brass will naturally darken and develop a patina over time – many people prefer that vintage look. To keep it shiny, polish with a soft cloth and a mild brass cleaner (like Brasso) or a paste of lemon juice and baking soda. If you want a long‑lasting shine without maintenance, you can spray a clear lacquer, but that’s optional.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003e📏 How do I select the right ball diameter for my project?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eSmaller balls (6–12mm) work well on delicate lamps, jewelry boxes, or as screw covers on thin furniture. Medium (15–20mm) is the sweet spot for most table lamps, drawer knobs, or foot caps. Large (21.5–25mm) makes a statement – great for chandeliers, heavy floor lamps, or as a prominent finial on a cabinet. Also consider the thread size: M3–M5 usually pair with 6–12mm balls; M6–M12 pair with 15–25mm balls.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cdiv class=\"hdiy-faq-question\"\u003e🛠️ Can I use these outdoors or in a bathroom?\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-answer\"\u003eBrass naturally resists corrosion better than steel, but it will eventually tarnish from moisture. They’re fine for indoor use (living rooms, bedrooms, dry workshops). For bathrooms or covered outdoor areas, the brass will still hold up structurally but may develop a darker patina faster. If you need a true weatherproof finish, consider lacquering or using stainless steel options.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"6mm【Female M3*0.5】 \/ 10 PCS","offer_id":52253491396882,"sku":"AdaahDZ33777x10","price":6.87,"currency_code":"USD","in_stock":true},{"title":"8mm【Female M4*0.7】 \/ 10 PCS","offer_id":52253491429650,"sku":"AdaahDZ33778x10","price":7.38,"currency_code":"USD","in_stock":true},{"title":"10mm【Female M4*0.7】 \/ 10 PCS","offer_id":52253491462418,"sku":"AdaahDZ33779x10","price":8.64,"currency_code":"USD","in_stock":true},{"title":"10mm【Female M5*0.8】 \/ 10 PCS","offer_id":52253491495186,"sku":"AdaahDZ33780x10","price":8.64,"currency_code":"USD","in_stock":true},{"title":"10mm【Female M3*0.5】 \/ 10 PCS","offer_id":52253491527954,"sku":"AdaahDZ33781x10","price":8.64,"currency_code":"USD","in_stock":true},{"title":"12mm【Female M6*1】 \/ 5 PCS","offer_id":52253491560722,"sku":"AdaahDZ33782x5","price":9.38,"currency_code":"USD","in_stock":true},{"title":"15mm【Female M10*1】 \/ 5 PCS","offer_id":52253491593490,"sku":"AdaahDZ33783x5","price":10.24,"currency_code":"USD","in_stock":true},{"title":"16mm【Female M10*1】 \/ 5 PCS","offer_id":52253491626258,"sku":"AdaahDZ33784x5","price":11.63,"currency_code":"USD","in_stock":true},{"title":"17.5mm【Female M10*1】 \/ 5 PCS","offer_id":52253491659026,"sku":"AdaahDZ33785x5","price":15.0,"currency_code":"USD","in_stock":true},{"title":"20mm【Female M10*1】 \/ 2 PCS","offer_id":52253491691794,"sku":"AdaahDZ33786x2","price":10.88,"currency_code":"USD","in_stock":true},{"title":"20mm【Female M12*1】 \/ 2 PCS","offer_id":52253491724562,"sku":"AdaahDZ33787x2","price":9.76,"currency_code":"USD","in_stock":true},{"title":"21.5mm【Female M4*0.7】 \/ 2 PCS","offer_id":52253491757330,"sku":"AdaahDZ33788x2","price":14.73,"currency_code":"USD","in_stock":true},{"title":"25mm【Female M12*1】 \/ 1 PCS","offer_id":52253491790098,"sku":"AdaahDZ33789x1","price":11.37,"currency_code":"USD","in_stock":true},{"title":"25mm【Female M10*1】 \/ 1 PCS","offer_id":52253491822866,"sku":"AdaahDZ33790x1","price":11.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of19_531196bb-3f3f-4f03-9305-0b3ae46b562d.jpg?v=1778492206","url":"https:\/\/homediyer.com\/products\/brass-ball-cap-nuts-m3-m12","provider":"HomeDIYer","version":"1.0","type":"link"}