{"product_id":"m2x4mm-aluminium-alloy-flat-head-knurled-thumb-screws-bolts-diy","title":"M2x4mm Aluminium Alloy Flat Head Knurled Thumb Screws Bolts For DIY Modification","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eM2x4mm Aluminium Alloy Knurled Thumb Screws — Tool-Free Fastening for Precision DIY Builds\u003c\/h2\u003e\n\u003cp\u003eWhen you're mid-build and reaching for a screwdriver slows everything down, a reliable knurled thumb screw makes the difference. These M2x4mm flat head knurled thumb screws are designed for makers, hobbyists, and electronics enthusiasts who need fast, repeatable hand-tightening without sacrificing holding strength. Whether you're assembling RC car chassis, securing acrylic panels, or fine-tuning 3D printer enclosures, fumbling with tools is the last thing you need.\u003c\/p\u003e\n\u003cp\u003eEach screw is machined from aluminium alloy with a flat head profile and a fully knurled shank for confident finger grip. The M2 thread diameter (2mm \/ ~0.079 in) and 4mm length (~0.157 in) make these a go-to fastener for compact electronics housings, lightweight frames, and thin-panel assemblies. Available in 10 anodized colors — Dark Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, and Orange — so you can color-code components or match your build's aesthetic.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include securing side panels on mini-ITX PC cases for tool-free access, fastening battery covers on RC models and drones, and mounting acrylic guards on CNC routers or laser engravers where frequent removal is needed. The flat head sits flush against the surface, keeping clearances tight in space-constrained assemblies.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eThread Compatibility:\u003c\/strong\u003e M2 metric thread (2mm diameter, 0.4mm pitch standard). Verify your tapped hole or nut spec before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These M2 Knurled Thumb Screws\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium Alloy Construction\u003c\/strong\u003e — Lightweight yet rigid; resists corrosion in typical indoor workshop and electronics environments without adding unnecessary mass to your build.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Head Profile\u003c\/strong\u003e — Sits flush or near-flush against the mating surface, keeping your assembly clean and preventing snagging on cables or adjacent components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Knurled Shank\u003c\/strong\u003e — The textured grip pattern allows confident hand-tightening and loosening without tools, ideal for panels and covers you access regularly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 Anodized Color Options\u003c\/strong\u003e — Color-code fasteners by function, match your build's color scheme, or simply add a visual accent to an otherwise utilitarian assembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Quantity Options\u003c\/strong\u003e — Available in 1, 2, 5, or 10-piece packs so you can grab a single replacement or stock up for a full project run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact M2 × 4mm Spec\u003c\/strong\u003e — Sized for thin-panel and lightweight-frame applications (thread diameter 2mm \/ ~0.079 in; length 4mm \/ ~0.157 in) where standard M3 or larger fasteners would be oversized.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — M2 Flat Head Knurled Thumb Screws\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eMetric M2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Diameter\u003c\/th\u003e\n\u003ctd\u003e2mm (~0.079 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003ctd\u003e0.4mm (standard M2 coarse)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScrew Length\u003c\/th\u003e\n\u003ctd\u003e4mm (~0.157 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eFlat Head (flush-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003eKnurled (hand-tighten, no tool required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eAluminium Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eAnodized (color options: Dark Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Orange)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Quantities\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 2 Pcs \/ 5 Pcs \/ 10 Pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Applications\u003c\/th\u003e\n\u003ctd\u003eElectronics enclosures, RC models, 3D printer frames, acrylic panels, mini-ITX cases, CNC guards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread size and pitch do these thumb screws use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws use a standard M2 metric thread with a 2mm nominal diameter and 0.4mm coarse pitch. This is the most common M2 specification. Before ordering, confirm your tapped hole or threaded insert matches M2 × 0.4mm to ensure a proper fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these strong enough for structural fastening, or only for light-duty panel work?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAluminium alloy thumb screws at M2 size are designed for light-duty, frequently-accessed fastening — think panel covers, battery doors, and access hatches rather than load-bearing joints. For structural connections subject to vibration or significant mechanical stress, a steel fastener with a tool-driven torque is more appropriate.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWill the anodized finish resist scratching and corrosion over time?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAnodizing creates an oxide layer that is harder than bare aluminium and provides good resistance to everyday corrosion in dry indoor environments. The finish can scratch under abrasive contact, but for typical workshop and electronics use — where screws are hand-tightened and removed periodically — the anodized color holds up well over repeated cycles.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these in a 3D printer frame or enclosure panel?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. M2 × 4mm is a common fastener size for 3D printer electronics covers, acrylic side panels, and lightweight frame brackets. The flat head profile keeps the screw flush with the panel surface, and the knurled grip makes it easy to remove panels for maintenance without reaching for a screwdriver.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right color for my build?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eColor choice is largely aesthetic, but many builders use a consistent color to mark a specific function — for example, all Black screws for ground-side connections or Golden screws for frequently-removed access panels. All color variants are the same M2 × 4mm specification; only the anodized finish differs.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat quantity pack should I order for a typical project?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a single panel with 2–4 fastener points, the 5-piece pack gives you the screws you need plus a spare. For a full enclosure build or a batch of RC models, the 10-piece pack is more economical per unit. The 1- or 2-piece options are useful when you need an exact replacement for a lost or damaged screw.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with standard M2 nuts and threaded inserts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes, provided the nut or insert is M2 × 0.4mm metric coarse — which is the standard for M2 hardware. Heat-set threaded inserts for 3D-printed parts and standard M2 hex nuts are both compatible. If you are using a non-standard pitch or a UNC\/UNF thread, these screws will not fit.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your Thread Dia x Length, Color, and Amount above, then add to cart.\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What thread size and pitch do these thumb screws use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws use a standard M2 metric thread with a 2mm nominal diameter and 0.4mm coarse pitch. Before ordering, confirm your tapped hole or threaded insert matches M2 × 0.4mm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these strong enough for structural fastening, or only for light-duty panel work?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Aluminium alloy thumb screws at M2 size are designed for light-duty, frequently-accessed fastening such as panel covers and battery doors. For structural connections subject to vibration or significant mechanical stress, a steel fastener with tool-driven torque is more appropriate.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will the anodized finish resist scratching and corrosion over time?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Anodizing creates an oxide layer harder than bare aluminium, providing good corrosion resistance in dry indoor environments. The finish holds up well over repeated hand-tightening cycles in typical workshop and electronics use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these in a 3D printer frame or enclosure panel?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. M2 × 4mm is a common fastener size for 3D printer electronics covers, acrylic side panels, and lightweight frame brackets. The flat head profile keeps the screw flush and the knurled grip allows tool-free removal.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right color for my build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Color choice is largely aesthetic. Many builders use a consistent color to mark a specific function. All color variants are the same M2 × 4mm specification; only the anodized finish differs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What quantity pack should I order for a typical project?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For a single panel with 2–4 fastener points, the 5-piece pack gives you the screws plus a spare. For a full enclosure build, the 10-piece pack is more economical. The 1- or 2-piece options are useful for exact replacements.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these compatible with standard M2 nuts and threaded inserts?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes, provided the nut or insert is M2 × 0.4mm metric coarse — the standard for M2 hardware. Heat-set threaded inserts for 3D-printed parts and standard M2 hex nuts are both compatible.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"M2 x 4mm \/ Dark Red \/ 1 Pcs","offer_id":52292723245330,"sku":"LRPGLBZSJ091391x1","price":6.9,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Dark Red \/ 2 Pcs","offer_id":52292723278098,"sku":"LRPGLBZSJ091391x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Dark Red \/ 5 Pcs","offer_id":52292723310866,"sku":"LRPGLBZSJ091391x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Dark Red \/ 10 Pcs","offer_id":52292723343634,"sku":"LRPGLBZSJ091391x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Rose Red \/ 1 Pcs","offer_id":52292723376402,"sku":"LRPGLBZSJ091392x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Rose Red \/ 2 Pcs","offer_id":52292723409170,"sku":"LRPGLBZSJ091392x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Rose Red \/ 5 Pcs","offer_id":52292723441938,"sku":"LRPGLBZSJ091392x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Rose Red \/ 10 Pcs","offer_id":52292723474706,"sku":"LRPGLBZSJ091392x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Golden \/ 1 Pcs","offer_id":52292723507474,"sku":"LRPGLBZSJ091393x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Golden \/ 2 Pcs","offer_id":52292723540242,"sku":"LRPGLBZSJ091393x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Golden \/ 5 Pcs","offer_id":52292723573010,"sku":"LRPGLBZSJ091393x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Golden \/ 10 Pcs","offer_id":52292723605778,"sku":"LRPGLBZSJ091393x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Royal Blue \/ 1 Pcs","offer_id":52292723638546,"sku":"LRPGLBZSJ091394x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Royal Blue \/ 2 Pcs","offer_id":52292723671314,"sku":"LRPGLBZSJ091394x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Royal Blue \/ 5 Pcs","offer_id":52292723704082,"sku":"LRPGLBZSJ091394x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Royal Blue \/ 10 Pcs","offer_id":52292723736850,"sku":"LRPGLBZSJ091394x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Sky Blue \/ 1 Pcs","offer_id":52292723769618,"sku":"LRPGLBZSJ091395x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Sky Blue \/ 2 Pcs","offer_id":52292723802386,"sku":"LRPGLBZSJ091395x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Sky Blue \/ 5 Pcs","offer_id":52292723835154,"sku":"LRPGLBZSJ091395x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Sky Blue \/ 10 Pcs","offer_id":52292723867922,"sku":"LRPGLBZSJ091395x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Black \/ 1 Pcs","offer_id":52292723900690,"sku":"LRPGLBZSJ091396x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Black \/ 2 Pcs","offer_id":52292723933458,"sku":"LRPGLBZSJ091396x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Black \/ 5 Pcs","offer_id":52292723966226,"sku":"LRPGLBZSJ091396x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Black \/ 10 Pcs","offer_id":52292723998994,"sku":"LRPGLBZSJ091396x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Silver \/ 1 Pcs","offer_id":52292724031762,"sku":"LRPGLBZSJ091397x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Silver \/ 2 Pcs","offer_id":52292724064530,"sku":"LRPGLBZSJ091397x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Silver \/ 5 Pcs","offer_id":52292724097298,"sku":"LRPGLBZSJ091397x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Silver \/ 10 Pcs","offer_id":52292724130066,"sku":"LRPGLBZSJ091397x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Green \/ 1 Pcs","offer_id":52292724162834,"sku":"LRPGLBZSJ091398x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Green \/ 2 Pcs","offer_id":52292724195602,"sku":"LRPGLBZSJ091398x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Green \/ 5 Pcs","offer_id":52292724228370,"sku":"LRPGLBZSJ091398x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Green \/ 10 Pcs","offer_id":52292724261138,"sku":"LRPGLBZSJ091398x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Purple \/ 1 Pcs","offer_id":52292724293906,"sku":"LRPGLBZSJ091399x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Purple \/ 2 Pcs","offer_id":52292724326674,"sku":"LRPGLBZSJ091399x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Purple \/ 5 Pcs","offer_id":52292724359442,"sku":"LRPGLBZSJ091399x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Purple \/ 10 Pcs","offer_id":52292724392210,"sku":"LRPGLBZSJ091399x10","price":13.27,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Orange \/ 1 Pcs","offer_id":52292724424978,"sku":"LRPGLBZSJ091400x1","price":6.23,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Orange \/ 2 Pcs","offer_id":52292724457746,"sku":"LRPGLBZSJ091400x2","price":7.34,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Orange \/ 5 Pcs","offer_id":52292724490514,"sku":"LRPGLBZSJ091400x5","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M2 x 4mm \/ Orange \/ 10 Pcs","offer_id":52292724523282,"sku":"LRPGLBZSJ091400x10","price":13.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-06_04b2b085-6695-4e25-8d36-f7bd57e44141.jpg?v=1782117834","url":"https:\/\/homediyer.com\/products\/m2x4mm-aluminium-alloy-flat-head-knurled-thumb-screws-bolts-diy","provider":"HomeDIYer","version":"1.0","type":"link"}