{"product_id":"star-knob-thumb-screws-clamping-bolts-m10-m12-m14-m16","title":"Star Knob Thumb Screws — Clamping Bolts with Hand Grip M10 M12 M14 M16","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eStar Knob Thumb Screws for Tool-Free Clamping — M10, M12, M14 \u0026amp; M16\u003c\/h2\u003e\n\u003cp\u003eIf you've ever struggled to loosen a standard hex bolt mid-project — knuckles scraped, wrench nowhere in sight — you know the value of a fastener you can adjust by hand. These star knob thumb screws are built for woodworkers, machinists, and DIYers who need quick, repeatable clamping without reaching for a tool every time.\u003c\/p\u003e\n\u003cp\u003eEach bolt features a five-point star-shaped hand grip head, giving you multiple contact points for firm, comfortable hand-tightening. Available in metric thread sizes M10, M12, M14, and M16, with lengths ranging from 100mm (≈3.9\") to 200mm (≈7.9\"). The M16 Nuts variant is a matching star knob nut, sold individually. Material is carbon steel with a protective surface finish; confirm finish specifics via the variant options or contact us.\u003c\/p\u003e\n\u003cp\u003eTypical applications include woodworking jig clamping bolts, machine guard fasteners, fixture hold-down bolts, and adjustable stop systems on drill presses or router tables — anywhere you need a hand-adjustable metric clamping bolt that stays put under vibration.\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 Metric coarse thread (ISO standard) — M10, M12, M14, M16. Not compatible with UNC\/UNF imperial threads. Verify your thread pitch before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e These are hand-tightening fasteners designed for clamping and fixturing — not for structural or high-torque load-bearing connections. If you need torque specs for your application, please contact us to confirm suitability.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Star Knob 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 five-point star grip lets you tighten and release by hand in seconds, making these ideal hand-adjustable clamping bolts for jigs and fixtures that need frequent repositioning.\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\u003c\/strong\u003e — Available in M10, M12, M14, and M16 thread diameters with lengths from 100mm (≈3.9\") to 200mm (≈7.9\"), covering the most common metric clamping bolt sizes for workshop and light industrial use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔗\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMetric Coarse Thread (ISO)\u003c\/strong\u003e — Standard metric pitch threads ensure compatibility with most metric threaded inserts, T-nuts, and tapped holes found in woodworking benches, CNC fixtures, and machine tables.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eProtective Surface Finish\u003c\/strong\u003e — Carbon steel construction with a corrosion-resistant coating provides durability in typical workshop environments and resists surface rust during normal indoor use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMulti-Point Star Grip Design\u003c\/strong\u003e — The star-shaped knob distributes hand pressure across multiple lobes, reducing finger fatigue during repeated adjustments — a practical advantage over traditional wing nuts or round knobs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMatching M16 Star Nut Available\u003c\/strong\u003e — The M16 Nuts variant provides a matching star knob nut for use with threaded rod or standard bolts, letting you build complete hand-adjustable clamping assemblies without sourcing separate hardware.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Star Knob Thumb Screws \u0026amp; Clamping Bolts\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\u003eStar Knob Thumb Screw \/ Hand Clamping Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eMetric Coarse (ISO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Sizes\u003c\/th\u003e\n\u003ctd\u003eM10, M12, M14, M16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e100mm–200mm (≈3.9\"–7.9\") — see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003ctd\u003eM10: 1.5mm \/ M12: 1.75mm \/ M14: 2.0mm \/ M16: 2.0mm (standard coarse)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003e5-point star knob (hand grip)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon steel with protective surface finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish \/ Coating\u003c\/th\u003e\n\u003ctd\u003eSee variant options or contact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNut Variant\u003c\/th\u003e\n\u003ctd\u003eM16 star knob nut (sold as 1pcs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece per variant (1pcs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Method\u003c\/th\u003e\n\u003ctd\u003eHand-tightened (no tool required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Use\u003c\/th\u003e\n\u003ctd\u003eJigs, fixtures, machine guards, adjustable stops, clamping assemblies\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-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right thread size and length for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the thread diameter (M10, M12, M14, or M16) to your existing threaded hole or insert. For length, measure the total clamping depth and add the thickness of any washers or spacers. As a general rule, the bolt should engage at least 1.5× its diameter in thread depth — for example, an M12 bolt should engage at least 18mm (≈11\/16\") of thread. Lengths in this listing range from 100mm (≈3.9\") to 200mm (≈7.9\").\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat material are these star knob clamping bolts made from?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese thumb screws are generally made from carbon steel with a protective surface finish — typically zinc plating or black oxide coating — to resist corrosion under normal indoor workshop conditions. Please contact us to confirm the exact finish if your application has specific requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these clamping bolts be used outdoors or in wet environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese bolts are suitable for light outdoor or occasional moisture exposure, but are not designed for prolonged outdoor, marine, or high-humidity environments. For outdoor use, we recommend applying a corrosion-inhibiting lubricant. Contact us to confirm suitability for your specific conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these metric or imperial thread? Will they fit my existing hardware?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are metric coarse-thread bolts following ISO standards. Thread pitches are typically: M10 × 1.5mm, M12 × 1.75mm, M14 × 2.0mm, M16 × 2.0mm. They are \u003cstrong\u003enot\u003c\/strong\u003e compatible with UNC or UNF imperial threads. Always verify your existing thread standard before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow much clamping force can these thumb screws handle?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese star knob bolts are designed for hand-tightening in jigs, fixtures, and light machinery — not for high-torque structural connections. Clamping force depends on thread size and the hand torque applied. In most cases, they provide sufficient holding force for woodworking jigs, adjustable stops, and machine guards. For heavy-load or vibration-critical applications, contact us to confirm suitability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need any tools to install or remove these thumb screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eNo tools are required. The star-shaped knob provides multiple grip points for comfortable hand-tightening and loosening. This makes them ideal for applications where frequent adjustments are needed — such as woodworking jigs, camera rigs, or machine guards — without reaching for a wrench each time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the \"M16 Nuts\" variant — is it a nut or a bolt?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe \"M16 Nuts\" variant is a standalone M16 star-shaped hand knob nut, sold separately from the bolts. It can be used as a locking nut or paired with a standard M16 threaded rod or bolt to create a complete tool-free clamping assembly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these bolts with T-track or T-slot systems on my workbench?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIn most cases, yes — these metric thumb screws are compatible with T-nuts and threaded inserts commonly used in woodworking benches and CNC router tables, provided the T-nut thread matches the bolt size (M10, M12, M14, or M16). Always verify the thread size of your T-track hardware before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003ethread size and length\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M10x130mm \/ 1pcs","offer_id":52292826628370,"sku":"FXLh88-1x1","price":26.29,"currency_code":"USD","in_stock":true},{"title":"M10x140mm \/ 1pcs","offer_id":52292826661138,"sku":"FXLh88-2x1","price":28.15,"currency_code":"USD","in_stock":true},{"title":"M10x150mm \/ 1pcs","offer_id":52292826693906,"sku":"FXLh88-3x1","price":30.68,"currency_code":"USD","in_stock":true},{"title":"M10x160mm \/ 1pcs","offer_id":52292826726674,"sku":"FXLh88-4x1","price":31.91,"currency_code":"USD","in_stock":true},{"title":"M12x100mm \/ 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