{"product_id":"220pcs-brass-heat-insert-nuts-m2-m3-m4-m5-m6-knurled-embedment-kit","title":"220 PCS Brass Heat Insert Nuts M2–M6 Knurled Embedment Kit","description":"\u003ch2\u003e220-Piece Brass Heat Insert Nut Assortment – M2 to M6\u003c\/h2\u003e\n\u003cp\u003eGet a complete, ready-to-use collection of \u003cstrong\u003ebrass heat-set insert nuts\u003c\/strong\u003e covering six common metric sizes — M2, M2.5, M3, M4, M5, and M6. Whether you're working on 3D-printed parts, woodworking projects, or plastic enclosures, these knurled, double-twill embedment nuts deliver rock-solid threaded inserts that won't strip or spin out.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Choose These Heat Insert Nuts?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid Copper (Brass) Construction:\u003c\/strong\u003e Corrosion-resistant and highly durable — built to last through countless assembly and disassembly cycles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnurled Double-Twill Design:\u003c\/strong\u003e The diamond-knurled exterior bites deep into thermoplastics and soft materials for a permanent, wobble-free grip once heat-set.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e6 Sizes in One Kit:\u003c\/strong\u003e M2, M2.5, M3, M4, M5, and M6 — the most frequently used metric sizes for hobbyist and professional projects alike.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e220 Pieces Total:\u003c\/strong\u003e Generous quantity ensures you always have the right size on hand, minimising project downtime.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOrganised Storage Box Included:\u003c\/strong\u003e A dedicated compartment box keeps every size sorted and accessible, so you spend less time searching and more time building.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application:\u003c\/strong\u003e Ideal for FDM\/FFF 3D printing, RC vehicles, electronics enclosures, plastic injection moulded parts, woodworking, and general DIY assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Use Heat Insert Nuts\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eDesign or drill a hole in your workpiece slightly smaller than the insert's outer diameter.\u003c\/li\u003e\n  \u003cli\u003ePlace the insert nut on the tip of a soldering iron or dedicated heat-set tool.\u003c\/li\u003e\n  \u003cli\u003eGently press the heated nut flush into the material — the knurled exterior melts in and locks on cooling.\u003c\/li\u003e\n  \u003cli\u003eAllow to cool fully before threading your bolt or screw for a strong, reusable connection.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003cth\u003eTypical Use\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e0.4 mm\u003c\/td\u003e\n\u003ctd\u003eSmall electronics, PCB standoffs\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e0.45 mm\u003c\/td\u003e\n\u003ctd\u003eCompact enclosures, RC parts\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e0.5 mm\u003c\/td\u003e\n\u003ctd\u003e3D printed assemblies, servos\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e0.7 mm\u003c\/td\u003e\n\u003ctd\u003eStructural plastic panels\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003eMedium load-bearing joints\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0 mm\u003c\/td\u003e\n\u003ctd\u003eHeavy-duty plastic enclosures\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Copper (Brass)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type:\u003c\/strong\u003e Metric (M2 \/ M2.5 \/ M3 \/ M4 \/ M5 \/ M6)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Knurled Double-Twill Embedment\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 220 pieces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Compartment box included\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Tools \u0026amp; Accessories\u003c\/h3\u003e\n\u003cp\u003ePair these heat insert nuts with other workshop essentials from our store:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/18-pc-basswood-carving-blocks-whittling-wood-kit\"\u003e18 Pc Basswood Carving Blocks – Whittling Wood Kit for Carvers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What tool do I need to install these brass heat insert nuts?\u003c\/h4\u003e\n\u003cp\u003eA: You can use a standard soldering iron or a dedicated heat-set insert tool. Set the tool to around 200–250 °C (depending on your material), place the insert on the tip, and press it gently and evenly into the pre-drilled hole until it sits flush.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these heat insert nuts compatible with standard metric screws and bolts?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — all six sizes (M2, M2.5, M3, M4, M5, M6) follow standard metric thread specifications, so they accept any corresponding standard metric bolt or machine screw.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What materials can I use these knurled embedment nuts with?\u003c\/h4\u003e\n\u003cp\u003eA: They are designed primarily for thermoplastics such as PLA, PETG, ABS, and nylon (common 3D printing filaments), as well as injection-moulded plastics and soft wood composites. They are not intended for use in metals or hard ceramics.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many nuts of each size are included in the 220-piece set?\u003c\/h4\u003e\n\u003cp\u003eA: The set is distributed across M2, M2.5, M3, M4, M5, and M6 sizes. Each size comes in multiples sufficient for a wide range of projects; the exact per-size count is listed on the compartment box label included with your order.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What tool do I need to install these brass heat insert nuts?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can use a standard soldering iron or a dedicated heat-set insert tool. 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