{"product_id":"m2-outer-diameter-3-8-and-4-0-copper-nut-hot-melt-nut-metric-brass-threaded-insert-for-plastic-embedding-available-in-multiple-sizes-and-lengths-from-3-0mm-to-6-0mm","title":"M2 Outer Diameter 3.8 and 4.0 Copper Nut Hot Melt Nut Metric Brass Threaded Insert for Plastic Embedding Available in Multiple Sizes and Lengths from 3.0mm to 6.0mm","description":"\u003ch1\u003eM2 and M3 Brass Hot Melt Copper Nuts – Outer Diameter 3.8mm\/4.0mm\/4.2mm for Plastic Embedding\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251589815.webp\"\u003e\u003c\/div\u003e\u003cp\u003eWhen working with plastic components, stripped threads can ruin an assembly. These hot melt copper nuts provide a permanent, reusable threaded socket that is installed by heating and pressing into a pre-drilled hole. Made from brass and manufactured to the metric GB national standard, they offer consistent dimensions and reliable performance across a wide range of embedding applications. With eight distinct size variants covering M2 and M3 threads, outer diameters from 3.8mm to 4.2mm, and heights from 3.0mm to 6.0mm, there is a suitable option for most common plastic housing thicknesses.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251589827.webp\"\u003e\u003c\/div\u003e\u003cp\u003eEach hot melt nut is precision-machined from brass with an untreated surface finish. The metric GB standard ensures that thread pitch and outer diameter tolerances are consistent, making them straightforward to integrate into existing designs or new projects.\u003c\/p\u003e\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\u003cp\u003eThe nuts are made entirely from brass, a material chosen for its good electrical conductivity, natural corrosion resistance, and ability to be heated and pressed into thermoplastics without excessive cooling shrinkage. The untreated surface maintains the natural brass colour, which is useful for visual identification of the embedded insert.\u003c\/p\u003e\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\u003cp\u003eSelect from eight styles: A through D are M2 thread with a 4.0mm outer diameter and heights of 3.0mm, 4.0mm, 4.5mm, and 5.0mm. Styles E through H are M3 thread with a 4.2mm outer diameter and heights of 3.0mm, 4.0mm, 5.0mm, and 6.0mm. The outer diameters of 3.8mm and 4.0mm (M2) and 4.2mm (M3) suit standard hole sizes for hot-staking into plastic.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251590099.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThese brass inserts are intended for embedding into thermoplastic materials where a strong, reusable thread is needed. The heat-and-press installation method creates a permanent bond without glue or additional fasteners.\u003c\/p\u003e\u003ch3\u003eEvent or Professional Use\u003c\/h3\u003e\u003cp\u003eIn manufacturing and prototyping environments, these nuts allow repeated assembly and disassembly of plastic enclosures, jigs, and fixtures without degrading the host material. The metric GB standard thread ensures compatibility with standard M2 and M3 machine screws.\u003c\/p\u003e\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\u003cp\u003eFor hobbyists repairing or building plastic items such as electronics cases, 3D-printed parts, or household fittings, these inserts provide a robust solution. The 200- or 300-piece pack sizes offer a practical stock for multiple projects.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251590102.webp\"\u003e\u003c\/div\u003e\u003cp\u003eHot melt copper nuts reduce the risk of thread stripping in plastic, extending the life of the assembly. The range of sizes means you can select the right insert for the plastic thickness without modifying the design.\u003c\/p\u003e\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\u003cp\u003eOnce installed, the brass insert can be unscrewed and re-screwed many times without wear, unlike threads tapped directly into plastic. The untreated brass surface does not require any special maintenance or coating.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eWith eight size options, clear metric specifications, and pack quantities of 200 or 300 pieces, this range covers most common embedding requirements. The untreated brass finish and GB standard dimensions make them a straightforward choice for anyone who needs reliable threaded inserts in plastic.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251709054.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251709100.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251709102.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1614251709103.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1616506382517.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1616506382523.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1616506382530.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Brass hot melt copper nuts with M2 and M3 thread, outer diameters 3.8mm to 4.2mm, heights 3.0mm to 6.0mm\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US11\/981\/2025-09-30\/original-image\/1616506382538.webp\"\u003e\u003c\/div\u003e","brand":"huc4ji-en","offers":[{"title":"F","offer_id":57758501011787,"sku":"CJJC102157806FU","price":71.88,"currency_code":"GBP","in_stock":true},{"title":"E","offer_id":57758501044555,"sku":"CJJC102157805EV","price":70.88,"currency_code":"GBP","in_stock":true},{"title":"A","offer_id":57758501077323,"sku":"CJJC102157801AZ","price":73.88,"currency_code":"GBP","in_stock":true},{"title":"D","offer_id":57758501110091,"sku":"CJJC102157804DW","price":74.88,"currency_code":"GBP","in_stock":true},{"title":"G","offer_id":57758501142859,"sku":"CJJC102157807GT","price":72.88,"currency_code":"GBP","in_stock":true},{"title":"H","offer_id":57758501175627,"sku":"CJJC102157808HS","price":73.88,"currency_code":"GBP","in_stock":true},{"title":"C","offer_id":57758501208395,"sku":"CJJC102157803CX","price":74.88,"currency_code":"GBP","in_stock":true},{"title":"B","offer_id":57758501241163,"sku":"CJJC102157802BY","price":73.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1042\/6086\/2283\/files\/1614251589815.webp?v=1783081992","url":"https:\/\/huc4ji-en.myshopify.com\/products\/m2-outer-diameter-3-8-and-4-0-copper-nut-hot-melt-nut-metric-brass-threaded-insert-for-plastic-embedding-available-in-multiple-sizes-and-lengths-from-3-0mm-to-6-0mm","provider":"WanderGoods","version":"1.0","type":"link"}