{"product_id":"m3-35mm-aluminum-knurled-thumb-screws-colorful-hand-grip-knob-bolts","title":"M3 x 35mm Aluminum Knurled Thumb Screws Colorful Hand Grip Knob Bolts","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eM3 x 35mm Aluminum Knurled Thumb Screws — Color-Coded Hand-Tighten Knob Bolts for Thicker Panels\u003c\/h2\u003e\n\u003cp\u003eWhen standard short thumb screws don’t reach through your stacked panels, spacers, or thicker enclosure walls, you need a longer fastener that still lets you open and close without reaching for a screwdriver. Makers, 3D printer builders, RC modders, and electronics hobbyists who work with thicker assemblies rely on \u003cstrong\u003eM3 x 35mm aluminum knurled thumb screws\u003c\/strong\u003e to keep tool-free access while handling more material depth.\u003c\/p\u003e\n\u003cp\u003eEach screw is M3 x 35mm (≈1-3\/8\") with a standard M3 metric coarse thread at 0.5mm pitch. Made from aluminum alloy for a lightweight build, these screws are available in 10 colors — Royal Blue, Sky Blue, Dark Red, Rose, Black, Silver, Deep Purple, Green, Golden, and Orange — and sold in packs of 1, 5, 10, 50, or 100 pieces. The large knurled knob head provides a wide grip surface for comfortable hand-tightening without any tools.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include fastening thick side panels on 3D printer enclosures, securing stacked PCB mounts or standoff assemblies, assembling RC model chassis where multiple layers of material are involved, and adding color-coded fasteners to DIY instrument panels or workshop jigs. These are a practical choice for \u003cem\u003elong M3 thumb screws for thick panels\u003c\/em\u003e and \u003cem\u003ealuminum hand-tighten bolts for 3D printer enclosures\u003c\/em\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eThread Compatibility:\u003c\/strong\u003e Standard M3 × 0.5mm metric coarse thread — fits any ISO-standard M3 threaded hole, heat-set insert, or nut.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These M3 x 35mm Aluminum Knurled Thumb Screws\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e35mm Length for Thicker Applications\u003c\/strong\u003e — At 35mm (≈1-3\/8\"), these screws reach through thicker panels, stacked components, or assemblies with spacers where shorter thumb screws fall short — without sacrificing tool-free convenience.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎨\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e10 Color Options\u003c\/strong\u003e — Available in Royal Blue, Sky Blue, Dark Red, Rose, Black, Silver, Deep Purple, Green, Golden, and Orange, making it easy to color-code access points or match your build’s aesthetic.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✋\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLarge Knurled Knob for Tool-Free Use\u003c\/strong\u003e — The wide knurled head provides a comfortable grip surface for hand-tightening, making these ideal for \u003cem\u003etool-free panel fasteners\u003c\/em\u003e on enclosures and frames that need frequent access.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eLightweight Aluminum Alloy Construction\u003c\/strong\u003e — Aluminum alloy is significantly lighter than steel, making these screws a practical choice for weight-sensitive builds like RC aircraft frames, portable enclosures, and 3D printer panels.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔘\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStandard M3 × 0.5mm Metric Thread\u003c\/strong\u003e — Conforms to ISO 68-1 metric coarse thread specification, ensuring compatibility with M3 threaded inserts, brass heat-set inserts, and standard M3 nuts used in \u003cem\u003e3D printer thumb screw applications\u003c\/em\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Order as few as 1 piece for a quick replacement or up to 100 pieces for a full build. Per-unit cost decreases with larger packs, making it practical for workshop stock.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — M3 Aluminum Knurled Thumb Screws\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\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\u003eLength\u003c\/th\u003e\n\u003ctd\u003e35mm (≈1-3\/8\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Type\u003c\/th\u003e\n\u003ctd\u003eKnurled knob (raised, large-diameter grip head)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Colors\u003c\/th\u003e\n\u003ctd\u003eRoyal Blue, Sky Blue, Dark Red, Rose, Black, Silver, Deep Purple, Green, Golden, Orange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Type\u003c\/th\u003e\n\u003ctd\u003eHand-tighten (knurled knob); no tool required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eISO 68-1 Metric Coarse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e1, 5, 10, 50, 100 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e Aluminum alloy thumb screws are designed for hand-tightened, light-duty applications. They are not recommended for high-torque or structural load-bearing use. If maximum strength is required, consider our stainless steel thumb screw options.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat size are these thumb screws and what will they fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are M3 x 35mm knurled thumb screws with a standard M3 metric coarse thread at 0.5mm pitch. The 35mm (≈1-3\/8\") length is generally suitable for fastening thicker panels or stacked components. Assuming 3–6mm of thread engagement, they can typically accommodate a combined material thickness of roughly 29–32mm. They fit any M3-threaded hole, brass heat-set insert, or M3 nut following the ISO metric thread standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy would I choose 35mm instead of a shorter M3 thumb screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 35mm length is useful when you need to fasten through thicker materials, stacked panels, or when a spacer or standoff is involved in the assembly. If your application involves a single thin panel, a shorter length such as 20mm may be more appropriate. Generally, choose a length that provides at least 3–4mm of thread engagement beyond the total material thickness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat material are these thumb screws made from?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws are made from aluminum alloy, which makes them significantly lighter than steel fasteners. Aluminum alloy is generally suitable for light-duty hand-tightened applications where weight savings and color variety matter more than maximum tensile strength — such as 3D printer panels, RC chassis, and electronics enclosures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are aluminum thumb screws compared to steel ones?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy is generally lighter and softer than steel. For hand-tightened applications such as panel covers, 3D printer frames, RC model chassis, and electronics enclosures, aluminum thumb screws are typically sufficient. They are not recommended for high-torque or structural load-bearing applications where steel fasteners would be more appropriate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these thumb screws suitable for outdoor or humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eAluminum alloy has natural oxidation resistance and generally performs well in dry or mildly humid indoor environments. For prolonged outdoor or high-moisture exposure, aluminum is generally less corrosion-resistant than stainless steel in harsh outdoor conditions. Contact us if you need guidance for your specific environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these screws follow, and what will they fit?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws use the standard M3 metric coarse thread at 0.5mm pitch, conforming to ISO 68-1. They are compatible with any M3-threaded hole, brass heat-set insert, or standard M3 nut — including those commonly used in 3D printer frames, electronics enclosures, and RC model chassis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many colors are available and how do I choose?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese thumb screws are available in 10 colors: Royal Blue, Sky Blue, Dark Red, Rose, Black, Silver, Deep Purple, Green, Golden, and Orange. Select your preferred color from the variant options above. Many builders choose colors that match their build theme, or use a contrasting color to make access panels easy to identify at a glance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your color and quantity above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3*35 \/ Royal Blue \/ 1","offer_id":52291394076946,"sku":"GLFBMWXGLBZSJ090911x1","price":8.46,"currency_code":"USD","in_stock":true},{"title":"M3*35 \/ Royal Blue \/ 5","offer_id":52291394109714,"sku":"GLFBMWXGLBZSJ090911x5","price":15.67,"currency_code":"USD","in_stock":true},{"title":"M3*35 \/ Royal Blue \/ 10","offer_id":52291394142482,"sku":"GLFBMWXGLBZSJ090911x10","price":26.76,"currency_code":"USD","in_stock":true},{"title":"M3*35 \/ Royal Blue \/ 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