{"product_id":"m3-5mm-knurled-thumb-screws-aluminum","title":"M3 x 5mm Anodized Aluminum Knurled Thumb Screws – Hand Grip Knob Bolts","description":"\u003cstyle\u003e\n  \/* 统一前缀 hdiy-，避免样式冲突 *\/\n  .hdiy-product-wrap {\n    margin: 0;\n    padding: 0;\n  }\n  .hdiy-product-wrap h2,\n  .hdiy-product-wrap h3 {\n    margin-top: 1.5em;\n    margin-bottom: 0.5em;\n    font-weight: 600;\n  }\n  .hdiy-product-wrap p {\n    margin-bottom: 1em;\n    line-height: 1.5;\n  }\n  .hdiy-features-list {\n    list-style: none;\n    padding-left: 0;\n  }\n  .hdiy-features-list li {\n    margin-bottom: 0.75em;\n    padding-left: 1.5em;\n    position: relative;\n    line-height: 1.4;\n  }\n  .hdiy-features-list li::before {\n    content: \" \";\n    position: absolute;\n    left: 0;\n    top: 0;\n  }\n  .hdiy-table-wrapper {\n    overflow-x: auto;\n    margin: 1.2em 0;\n  }\n  .hdiy-specs-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 0.95rem;\n    background: #fff;\n    min-width: 300px;\n  }\n  .hdiy-specs-table th,\n  .hdiy-specs-table td {\n    border: 1px solid #ddd;\n    padding: 10px 12px;\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    border-bottom: 1px solid #eee;\n    padding-bottom: 0.75rem;\n  }\n  .hdiy-faq-question {\n    font-weight: 700;\n    margin-bottom: 0.35rem;\n    font-size: 1rem;\n  }\n  .hdiy-faq-answer {\n    margin-top: 0;\n    line-height: 1.45;\n    color: #2c2c2c;\n  }\n  @media (max-width: 640px) {\n    .hdiy-specs-table th,\n    .hdiy-specs-table td {\n      padding: 8px 10px;\n    }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"hdiy-product-wrap\"\u003e\n  \n  \u003c!-- Product Overview --\u003e\n  \u003ch2\u003e🔧 Product Overview: M3 x 5mm Aluminum Alloy Knurled Thumb Screws – Hand Grip Knob Bolts (Anodized)\u003c\/h2\u003e\n  \u003cp\u003eFor precision fastening in tight spaces where tool‑less access is a priority, these M3 knurled thumb screws are an excellent choice. Machined from 6061 aluminum alloy with a durable anodized finish, they offer a lightweight, corrosion‑resistant, and attractive solution. The knurled round head provides a secure, non‑slip grip for hand tightening and loosening – no screwdriver needed. Fully threaded with M3 coarse pitch (0.5mm), and a 5mm thread length (measured under the head). Ideal for machinery, precision molds, bearing assembly, and other applications requiring frequent manual adjustment.\u003c\/p\u003e\n  \n  \u003c!-- Key Features List --\u003e\n  \u003ch2\u003e✨ Why Choose These Anodized Aluminum Thumb Screws\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features-list\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh‑quality 6061 aluminum alloy\u003c\/strong\u003e – Lightweight, strong, and corrosion‑resistant. Anodized finish adds durability and a professional appearance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKnurled round head for tool‑less grip\u003c\/strong\u003e – Diamond knurl pattern provides excellent finger traction for hand tightening and loosening – no tools required.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSmooth, burr‑free workmanship\u003c\/strong\u003e – High quality manufacturing ensures consistent threads and a clean finish for reliable fastening.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM3 metric thread – fully threaded\u003c\/strong\u003e – Standard coarse pitch (0.5mm). Threads run the entire 5mm length for maximum grip.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e5mm thread length (under head)\u003c\/strong\u003e – Ideal for thin panels, shallow threaded holes, and applications where minimal protrusion is desired.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCorrosion \u0026amp; rust resistant\u003c\/strong\u003e – Anodized aluminum resists oxidation and wear, ensuring long service life.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide applications\u003c\/strong\u003e – Machinery, precision molds, bearing assembly, 3D printers, camera rigs, and general DIY.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003c!-- Specifications Table (fixed: no colspan, clean two‑column rows) --\u003e\n  \u003ch2\u003e📏 Technical Specifications – M3 Knurled Thumb Screws (5mm Length)\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrapper\"\u003e\n    \u003ctable class=\"hdiy-specs-table\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eKnurled Thumb Screws (Hand Grip Knob Bolts)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e6061 Aluminum Alloy (anodized)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Size\u003c\/th\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003ctd\u003e0.5mm (metric coarse)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Length (under head)\u003c\/th\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLength Measurement\u003c\/th\u003e\n\u003ctd\u003eUnder head – from underside of head to tip (head not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eKnurled round head (diamond knurl)\u003c\/td\u003e\n        \u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003eHand grip (toolless)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnodized (various colors available)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTolerance\u003c\/th\u003e\n\u003ctd\u003e±0.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \n  \u003c!-- Frequently Asked Questions --\u003e\n  \u003ch2\u003e❓ FAQs – M3 Knurled Thumb Screws\u003c\/h2\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 How is the 5mm thread length measured? Is it enough for my project?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eThread length is measured from the underside of the knurled head to the tip. A 5mm threaded shank is suitable for material thickness up to 3‑4mm when using a nut, or for pre‑tapped holes up to 5mm deep. For thicker panels, consider a longer version (contact us for custom lengths).\u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 Are these screws fully threaded? What is the thread pitch?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eYes – they are fully threaded from under the head to the tip. The thread pitch is standard M3 coarse: 0.5mm.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 Will the anodized finish wear off over time?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eAnodizing is an electrochemical process that creates a durable, bonded oxide layer. It will not peel like paint. Under normal hand use, the finish will remain intact for years. Heavy abrasion may wear the surface, but typical thumb screw applications are gentle.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 Can I use these screws with nuts, or are they for tapped holes only?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eThese are standard machine screws – they work with matching M3 nuts or in pre‑tapped holes. For through‑hole applications, use a nut on the back side. The knurled head is designed for hand grip only – do not use tools on the knurling.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 What colors are available?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eWe offer a range of anodized colors – please select your preferred color from the dropdown options when ordering. Common colors include Black, Silver, Red, Blue, Gold, and Green. Note that colors may vary slightly due to lighting and photography.\u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"hdiy-faq-item\"\u003e\n    \u003cdiv class=\"hdiy-faq-question\"\u003e🔸 Are these screws magnetic? Will they affect sensitive electronics?\u003c\/div\u003e\n    \u003cdiv class=\"hdiy-faq-answer\"\u003eAluminum is non‑magnetic, so these thumb screws will not interfere with sensitive electronics, magnetic sensors, or precision instruments. They are completely safe for use near hard drives, medical devices, and measuring equipment.\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3*5mm \/ Dark Red \/ 1","offer_id":52292448649490,"sku":"GLFBMWXGLBZSJ090824x1","price":6.64,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ Dark Red \/ 5","offer_id":52292448682258,"sku":"GLFBMWXGLBZSJ090824x5","price":10.85,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ Dark Red \/ 10","offer_id":52292448715026,"sku":"GLFBMWXGLBZSJ090824x10","price":12.89,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ Dark Red \/ 50","offer_id":52292448747794,"sku":"GLFBMWXGLBZSJ090824x50","price":49.1,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ Dark Red \/ 100","offer_id":52292448780562,"sku":"GLFBMWXGLBZSJ090824x100","price":96.29,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ Rose Red \/ 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