{"product_id":"knurled-thumb-screws-stainless-steel-m2-m3-m4-m5-m6-m8-m10","title":"Knurled Thumb Screws Stainless Steel — M2 M2.5 M3 M4 M5 M6 M8 M10 Hand Knob Bolts","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eKnurled Thumb Screws Stainless Steel — Tool-Free Fastening for Precision Applications\u003c\/h2\u003e\n\u003cp\u003eIf you've ever struggled to tighten or loosen a fastener in a tight enclosure, on a 3D printer frame, or inside an electronics panel — only to realize you don't have the right screwdriver on hand — you know exactly why knurled thumb screws exist. Makers, engineers, hobbyists, and technicians who need fast, repeatable, tool-free access to panels and assemblies rely on hand knob bolts to get the job done without fumbling for tools.\u003c\/p\u003e\n\u003cp\u003eEach listing covers a single size-and-quantity combination. These stainless steel knurled thumb screws are available in thread diameters from M2 through M10, with lengths ranging from 6mm (≈1\/4\") to 60mm (≈2-3\/8\"). The knurled cylindrical head provides a secure grip surface for finger-tightening, and the fully threaded shank engages standard metric tapped holes and nuts. Select your size and piece count (1, 2, or 5 pcs) from the variant options above.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include securing access panels on electronics enclosures, adjusting and locking components on 3D printers and CNC machines, fastening inspection covers on DIY project boxes, and assembling jigs or fixtures where frequent disassembly is needed. These stainless steel hand knob bolts are a go-to solution for any application requiring tool-free metric fasteners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔵\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Standard ISO metric threads — fits M2, M2.5, M3, M4, M5, M6, M8, and M10 tapped holes, threaded inserts, and metric hex nuts. Not compatible with imperial (UNC\/UNF) threads.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Knurled Stainless Steel 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\u003eTool-Free Hand Tightening\u003c\/strong\u003e — The knurled cylindrical head provides a textured grip surface that allows secure finger-tightening without any screwdriver or wrench, ideal for tool-free metric fasteners in frequent-access assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🦾\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStainless Steel Construction\u003c\/strong\u003e — Made from stainless steel for corrosion resistance and durability, outperforming plain carbon steel fasteners in humid, indoor, and light outdoor environments.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eWide Size Range M2–M10\u003c\/strong\u003e — Covers the most common metric thread sizes used in electronics, robotics, 3D printing, and general DIY, from compact M2 x 6mm up to M10 x 60mm for heavier assemblies.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eStandard ISO Metric Thread Profile\u003c\/strong\u003e — Fully threaded shank conforms to standard metric thread specifications, ensuring compatibility with off-the-shelf metric nuts, threaded inserts, and tapped holes.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Quantity Options\u003c\/strong\u003e — Available in packs of 1, 2, or 5 pieces per order so you can buy exactly what your project needs — no overstocking on fasteners you won't use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eVersatile Application Fit\u003c\/strong\u003e — Suited for electronics enclosures, 3D printer frames, CNC fixtures, inspection panels, and DIY project boxes — anywhere repeatable hand-tightened assembly is needed.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Knurled Thumb Screws\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eKnurled Thumb Screw \/ Hand Knob Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eISO Metric (M-series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Thread Diameters\u003c\/th\u003e\n\u003ctd\u003eM2, M2.5, M3, M4, M5, M6, M8, M10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e6mm (≈1\/4\") – 60mm (≈2-3\/8\"); see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eKnurled cylindrical head (hand-grip \/ thumb-turn)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003eHand-tightened (no tool required); wrench-assist possible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Type\u003c\/th\u003e\n\u003ctd\u003eFully threaded shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e1, 2, or 5 pcs — select above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eSuitable for indoor and light outdoor use; contact us to confirm for marine environments\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\u003eHeads up:\u003c\/strong\u003e Thread pitch follows standard ISO metric coarse pitch for each diameter. If your application requires fine pitch threads, please contact us to confirm before ordering.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size and length thumb screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the thread diameter (M2, M3, M4, etc.) to your tapped hole or nut size. For length, measure the total material thickness you need to clamp and add typically 3–5mm for adequate thread engagement. Quick reference: 10mm ≈ 3\/8\", 25mm ≈ 1\", 50mm ≈ 2\". When in doubt, size up — a slightly longer screw is easier to work with than one that's too short.\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 thumb screws are made from stainless steel, which generally provides good corrosion resistance and mechanical strength. Stainless steel fasteners typically outperform plain carbon steel in humid or mildly corrosive environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these be used outdoors or in humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eStainless steel thumb screws are generally suitable for outdoor and humid environments, resisting rust and surface oxidation better than plain steel. For marine or highly corrosive environments, we recommend contacting us to confirm the specific grade before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these use — metric or imperial?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are metric thread fasteners (M2 through M10) following standard ISO metric thread profiles. They are \u003cstrong\u003enot\u003c\/strong\u003e compatible with imperial (UNC\/UNF) threaded holes. Always verify your application uses metric threads before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much clamping force or torque can these handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThumb screws are designed for hand-tightening applications where moderate clamping force is sufficient — typically electronics enclosures, adjustment panels, and fixture assemblies. They are not intended for high-torque structural connections. For load-bearing or safety-critical applications, contact us to confirm suitability before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need any tools to install these thumb screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo tools are required for standard installation. The knurled head is specifically designed for finger-tightening. In tight spaces, a small wrench or pliers can be used on the knurled body if additional torque is needed, but in most cases hand installation is sufficient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these compatible with standard metric nuts and threaded inserts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These thumb screws use standard ISO metric threads and are generally compatible with metric hex nuts, flange nuts, threaded inserts, and tapped holes of the corresponding size (M2–M10). Always verify thread pitch if your application uses fine-pitch threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003esize and quantity\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M2 x 6mm \/ 5","offer_id":52293049123090,"sku":"LLGFGY-TCWJTC68653x1","price":10.87,"currency_code":"USD","in_stock":true},{"title":"M2 x 8mm \/ 2","offer_id":52293049155858,"sku":"LLGFGY-TCWJTC68654x1","price":7.96,"currency_code":"USD","in_stock":true},{"title":"M2 x 10mm \/ 2","offer_id":52293049188626,"sku":"LLGFGY-TCWJTC68655x1","price":8.01,"currency_code":"USD","in_stock":true},{"title":"M2.5 x 6mm \/ 2","offer_id":52293049221394,"sku":"LLGFGY-TCWJTC68656x1","price":8.01,"currency_code":"USD","in_stock":true},{"title":"M2.5 x 8mm \/ 2","offer_id":52293049254162,"sku":"LLGFGY-TCWJTC68657x1","price":8.09,"currency_code":"USD","in_stock":true},{"title":"M2.5 x 10mm \/ 2","offer_id":52293049286930,"sku":"LLGFGY-TCWJTC68658x1","price":8.15,"currency_code":"USD","in_stock":true},{"title":"M2.5 x 12mm \/ 2","offer_id":52293049319698,"sku":"LLGFGY-TCWJTC68659x1","price":8.5,"currency_code":"USD","in_stock":true},{"title":"M3 x 6mm \/ 2","offer_id":52293049352466,"sku":"LLGFGY-TCWJTC68660x1","price":8.69,"currency_code":"USD","in_stock":true},{"title":"M3 x 8mm \/ 2","offer_id":52293049385234,"sku":"LLGFGY-TCWJTC68661x1","price":8.36,"currency_code":"USD","in_stock":true},{"title":"M3 x 10mm \/ 2","offer_id":52293049418002,"sku":"LLGFGY-TCWJTC68662x1","price":8.42,"currency_code":"USD","in_stock":true},{"title":"M3 x 12mm \/ 2","offer_id":52293049450770,"sku":"LLGFGY-TCWJTC68663x1","price":8.55,"currency_code":"USD","in_stock":true},{"title":"M3 x 16mm \/ 2","offer_id":52293049483538,"sku":"LLGFGY-TCWJTC68664x1","price":8.96,"currency_code":"USD","in_stock":true},{"title":"M3 x 20mm \/ 2","offer_id":52293049516306,"sku":"LLGFGY-TCWJTC68665x1","price":9.59,"currency_code":"USD","in_stock":true},{"title":"M3 x 25mm \/ 1","offer_id":52293049549074,"sku":"LLGFGY-TCWJTC68666x1","price":8.09,"currency_code":"USD","in_stock":true},{"title":"M3 x 30mm \/ 1","offer_id":52293049581842,"sku":"LLGFGY-TCWJTC68667x1","price":8.55,"currency_code":"USD","in_stock":true},{"title":"M4 x 8mm \/ 2","offer_id":52293049614610,"sku":"LLGFGY-TCWJTC68668x1","price":8.77,"currency_code":"USD","in_stock":true},{"title":"M4 x 10mm \/ 2","offer_id":52293049647378,"sku":"LLGFGY-TCWJTC68669x1","price":8.96,"currency_code":"USD","in_stock":true},{"title":"M4 x 12mm \/ 2","offer_id":52293049680146,"sku":"LLGFGY-TCWJTC68670x1","price":9.04,"currency_code":"USD","in_stock":true},{"title":"M4 x 16mm \/ 2","offer_id":52293049712914,"sku":"LLGFGY-TCWJTC68671x1","price":9.37,"currency_code":"USD","in_stock":true},{"title":"M4 x 20mm \/ 1","offer_id":52293049745682,"sku":"LLGFGY-TCWJTC68672x1","price":8.01,"currency_code":"USD","in_stock":true},{"title":"M4 x 25mm \/ 1","offer_id":52293049778450,"sku":"LLGFGY-TCWJTC68673x1","price":8.15,"currency_code":"USD","in_stock":true},{"title":"M4 x 30mm \/ 1","offer_id":52293049811218,"sku":"LLGFGY-TCWJTC68674x1","price":8.77,"currency_code":"USD","in_stock":true},{"title":"M5 x 10mm \/ 1","offer_id":52293049843986,"sku":"LLGFGY-TCWJTC68675x1","price":8.15,"currency_code":"USD","in_stock":true},{"title":"M5 x 12mm \/ 1","offer_id":52293049876754,"sku":"LLGFGY-TCWJTC68676x1","price":8.36,"currency_code":"USD","in_stock":true},{"title":"M5 x 16mm \/ 1","offer_id":52293049909522,"sku":"LLGFGY-TCWJTC68677x1","price":8.55,"currency_code":"USD","in_stock":true},{"title":"M5 x 20mm \/ 1","offer_id":52293049942290,"sku":"LLGFGY-TCWJTC68678x1","price":8.91,"currency_code":"USD","in_stock":true},{"title":"M5 x 25mm \/ 1","offer_id":52293049975058,"sku":"LLGFGY-TCWJTC68679x1","price":8.77,"currency_code":"USD","in_stock":true},{"title":"M5 x 30mm \/ 1","offer_id":52293050007826,"sku":"LLGFGY-TCWJTC68680x1","price":8.96,"currency_code":"USD","in_stock":true},{"title":"M5 x 35mm \/ 1","offer_id":52293050040594,"sku":"LLGFGY-TCWJTC68681x1","price":8.96,"currency_code":"USD","in_stock":true},{"title":"M5 x 40mm \/ 1","offer_id":52293050073362,"sku":"LLGFGY-TCWJTC68682x1","price":9.1,"currency_code":"USD","in_stock":true},{"title":"M6 x 12mm \/ 1","offer_id":52293050106130,"sku":"LLGFGY-TCWJTC68683x1","price":9.1,"currency_code":"USD","in_stock":true},{"title":"M6 x 16mm \/ 1","offer_id":52293050138898,"sku":"LLGFGY-TCWJTC68684x1","price":9.32,"currency_code":"USD","in_stock":true},{"title":"M6 x 20mm \/ 1","offer_id":52293050171666,"sku":"LLGFGY-TCWJTC68685x1","price":9.51,"currency_code":"USD","in_stock":true},{"title":"M6 x 25mm \/ 1","offer_id":52293050204434,"sku":"LLGFGY-TCWJTC68686x1","price":9.51,"currency_code":"USD","in_stock":true},{"title":"M6 x 30mm \/ 1","offer_id":52293050237202,"sku":"LLGFGY-TCWJTC68687x1","price":9.64,"currency_code":"USD","in_stock":true},{"title":"M6 x 35mm \/ 1","offer_id":52293050269970,"sku":"LLGFGY-TCWJTC68688x1","price":9.64,"currency_code":"USD","in_stock":true},{"title":"M6 x 40mm \/ 1","offer_id":52293050302738,"sku":"LLGFGY-TCWJTC68689x1","price":9.86,"currency_code":"USD","in_stock":true},{"title":"M6 x 45mm \/ 1","offer_id":52293050335506,"sku":"LLGFGY-TCWJTC68690x1","price":9.86,"currency_code":"USD","in_stock":true},{"title":"M6 x 50mm \/ 1","offer_id":52293050368274,"sku":"LLGFGY-TCWJTC68691x1","price":10.0,"currency_code":"USD","in_stock":true},{"title":"M8 x 16mm \/ 1","offer_id":52293050401042,"sku":"LLGFGY-TCWJTC68692x1","price":10.73,"currency_code":"USD","in_stock":true},{"title":"M8 x 20mm \/ 1","offer_id":52293050433810,"sku":"LLGFGY-TCWJTC68693x1","price":10.81,"currency_code":"USD","in_stock":true},{"title":"M8 x 25mm \/ 1","offer_id":52293050466578,"sku":"LLGFGY-TCWJTC68694x1","price":10.87,"currency_code":"USD","in_stock":true},{"title":"M8 x 30mm \/ 1","offer_id":52293050499346,"sku":"LLGFGY-TCWJTC68695x1","price":11.08,"currency_code":"USD","in_stock":true},{"title":"M8 x 35mm \/ 1","offer_id":52293050532114,"sku":"LLGFGY-TCWJTC68696x1","price":11.14,"currency_code":"USD","in_stock":true},{"title":"M8 x 40mm \/ 1","offer_id":52293050564882,"sku":"LLGFGY-TCWJTC68697x1","price":11.27,"currency_code":"USD","in_stock":true},{"title":"M8 x 45mm \/ 1","offer_id":52293050597650,"sku":"LLGFGY-TCWJTC68698x1","price":11.41,"currency_code":"USD","in_stock":true},{"title":"M8 x 50mm \/ 1","offer_id":52293050630418,"sku":"LLGFGY-TCWJTC68699x1","price":11.55,"currency_code":"USD","in_stock":true},{"title":"M10 x 35mm \/ 1","offer_id":52293050663186,"sku":"LLGFGY-TCWJTC68700x1","price":11.95,"currency_code":"USD","in_stock":true},{"title":"M10 x 40mm \/ 1","offer_id":52293050695954,"sku":"LLGFGY-TCWJTC68701x1","price":13.67,"currency_code":"USD","in_stock":true},{"title":"M10 x 45mm \/ 1","offer_id":52293050728722,"sku":"LLGFGY-TCWJTC68702x1","price":13.94,"currency_code":"USD","in_stock":true},{"title":"M10 x 50mm \/ 1","offer_id":52293050761490,"sku":"LLGFGY-TCWJTC68703x1","price":14.35,"currency_code":"USD","in_stock":true},{"title":"M10 x 60mm \/ 1","offer_id":52293050794258,"sku":"LLGFGY-TCWJTC68704x1","price":15.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_0b0b408a-09c3-4db9-87a9-e35c01ce552b.jpg?v=1781181437","url":"https:\/\/homediyer.com\/products\/knurled-thumb-screws-stainless-steel-m2-m3-m4-m5-m6-m8-m10","provider":"HomeDIYer","version":"1.0","type":"link"}