{"product_id":"m2-5-phillips-countersunk-flat-head-machine-screws-hex-nuts-iron-sets","title":"M2.5 Cross Countersunk Machine Screws Iron Phillips Flat Head Bolts with Hex Nut","description":"\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is included in each pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each pack contains 20 sets — 20 Phillips countersunk (flat head) M2.5 screws plus 20 matching M2.5 hex nuts. All four length options (M2.5×4, M2.5×6, M2.5×16, M2.5×25) are sold in 20-set packs.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What material are these screws made from?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws and nuts are made from iron (carbon steel). They are suitable for general-purpose indoor mechanical and electronics assembly applications where high corrosion resistance is not a primary requirement.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lengths are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Available lengths are M2.5×4 mm, M2.5×6 mm, M2.5×16 mm, and M2.5×25 mm. All variants have a 2.5 mm thread diameter and a flat head diameter of approximately 4.5 mm. Select your preferred length from the Size option above.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What head style and drive type do these screws use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws feature a countersunk (flat head) profile with a Phillips (cross) drive. The flat head sits flush with or below the surface when fully driven, making them ideal for applications requiring a clean, flush finish.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are typical applications for M2.5 countersunk screws?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"M2.5 countersunk screws are commonly used in small electronics, Raspberry Pi and Arduino enclosures, RC models, camera equipment, eyeglass frames, small appliances, and precision mechanical assemblies where a flush-fit M2.5 fastener is required.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the thread pitch for M2.5 screws?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard M2.5 screws use a coarse thread pitch of 0.45 mm (M2.5 x 0.45). This is the default metric coarse pitch for M2.5 and is compatible with standard M2.5 hex nuts, threaded inserts, and tapped holes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right length?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose a length based on the total thickness of the materials being fastened. For countersunk screws, the length is measured from the top of the head to the tip. Short lengths (4–6 mm) suit thin panels and PCB mounting; longer lengths (16–25 mm) are better for thicker assemblies or standoff applications with a nut.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are the hex nuts included in the pack?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Each pack includes matching M2.5 hex nuts — one nut per screw, 20 nuts total per pack. No need to source nuts separately.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eM2.5 Phillips Countersunk Flat Head Machine Screws with Hex Nuts — Iron, Flush-Fit Metric Fastener Sets for Electronics \u0026amp; Precision Assemblies\u003c\/h2\u003e\n    \u003cp\u003eSmall-scale assemblies demand small-scale precision. Whether you're mounting a Raspberry Pi board, securing an RC model panel, assembling a camera enclosure, or building a compact electronics project, hunting down matching M2.5 screws and nuts separately wastes time and risks mismatched threading. A complete screw-and-nut set in the right length eliminates that friction entirely.\u003c\/p\u003e\n    \u003cp\u003eThese M2.5 Phillips countersunk flat head machine screws come paired with matching M2.5 hex nuts — 20 sets per pack. The flat head profile (head diameter approximately 4.5 mm) sits flush with or below the surface when fully driven, keeping your assembly clean and snag-free. Available in four lengths — 4, 6, 16, and 25 mm — to cover thin panel mounting through deeper standoff applications. Material is iron (carbon steel), suited for general-purpose indoor mechanical and electronics use.\u003c\/p\u003e\n    \u003cp\u003eIdeal for Raspberry Pi and Arduino enclosures, RC models, camera equipment, small appliances, eyeglass frames, hobby electronics, and any precision mechanical assembly requiring a flush-fit M2.5 countersunk fastener with a matching nut.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e✅\u003c\/span\u003e\n    Metric M2.5 thread (0.45 mm pitch) · Phillips drive · Countersunk flat head (~4.5 mm head diameter) · Iron (carbon steel) · Includes matching M2.5 hex nuts — compatible with standard M2.5 threaded holes, inserts, and tapped holes\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These M2.5 Phillips Countersunk Screw + Hex Nut Sets\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eComplete Screw + Nut Sets\u003c\/strong\u003e — Each pack includes 20 Phillips countersunk M2.5 screws and 20 matching M2.5 hex nuts. No separate sourcing required — everything you need to fasten is in one pack.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e \u003cstrong\u003eFlush-Fit Countersunk Head\u003c\/strong\u003e — Flat head profile with ~4.5 mm head diameter sits flush with or below the surface when fully driven. Eliminates protruding heads that snag wiring, interfere with covers, or disrupt panel fit.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003ePhillips Cross Drive\u003c\/strong\u003e — Standard Phillips drive compatible with #0 or #1 Phillips screwdrivers. Uniform cross-drive recess with consistent thread pitch for reliable, repeatable fastening in precision assemblies.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💻\u003c\/span\u003e \u003cstrong\u003eElectronics-Ready M2.5 Sizing\u003c\/strong\u003e — M2.5 is the standard thread size for Raspberry Pi, Arduino, and SBC enclosures, RC model panels, camera mounts, and compact electronics assemblies. Four lengths (4, 6, 16, 25 mm) cover the most common panel and standoff thicknesses.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e \u003cstrong\u003ePrecision Thread Quality\u003c\/strong\u003e — Deep, uniform M2.5 × 0.45 mm pitch threads with consistent tooth spacing and burr-free surface. Evenly distributed fastening force reduces stripping risk in small-diameter applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003e20 Sets Per Pack\u003c\/strong\u003e — Practical pack quantity for prototyping, small production runs, and repair stock. Enough for multiple boards or enclosures without over-ordering bulk quantities.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — M2.5 Phillips Countersunk Machine Screw + Hex Nut Sets\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eCountersunk (Flat Head) Machine Screw + Hex Nut Set\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003ePhillips (cross) — #0 or #1 Phillips driver recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eCountersunk \/ Flat Head (flush-fit)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Diameter\u003c\/th\u003e\n\u003ctd\u003eApproximately 4.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Diameter\u003c\/th\u003e\n\u003ctd\u003eM2.5 (2.5 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003ctd\u003e0.45 mm (metric coarse, standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e4 mm · 6 mm · 16 mm · 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eIncluded Hardware\u003c\/th\u003e\n\u003ctd\u003e20 screws + 20 matching M2.5 hex nuts per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eIron (carbon steel)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSystem of Measurement\u003c\/th\u003e\n\u003ctd\u003eMetric\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e20 sets (20 screws + 20 nuts)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eRaspberry Pi \/ Arduino enclosures, RC models, camera equipment, small appliances, hobby electronics, precision mechanical assemblies\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\u003csummary\u003eWhat is included in each pack?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach pack contains 20 sets — 20 Phillips countersunk (flat head) M2.5 screws plus 20 matching M2.5 hex nuts. All four length options (M2.5×4, M2.5×6, M2.5×16, M2.5×25) are sold in 20-set packs.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat material are these screws made from?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws and nuts are made from iron (carbon steel). They are suitable for general-purpose indoor mechanical and electronics assembly applications where high corrosion resistance is not a primary requirement.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat lengths are available?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAvailable lengths are M2.5×4 mm, M2.5×6 mm, M2.5×16 mm, and M2.5×25 mm. All variants have a 2.5 mm thread diameter and a flat head diameter of approximately 4.5 mm. Select your preferred length from the Size option above.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat head style and drive type do these screws use?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws feature a countersunk (flat head) profile with a Phillips (cross) drive. The flat head sits flush with or below the surface when fully driven, making them ideal for applications requiring a clean, flush finish.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat are typical applications for M2.5 countersunk screws?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eM2.5 countersunk screws are commonly used in small electronics, Raspberry Pi and Arduino enclosures, RC models, camera equipment, eyeglass frames, small appliances, and precision mechanical assemblies where a flush-fit M2.5 fastener is required.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat is the thread pitch for M2.5 screws?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard M2.5 screws use a coarse thread pitch of 0.45 mm (M2.5 x 0.45). This is the default metric coarse pitch for M2.5 and is compatible with standard M2.5 hex nuts, threaded inserts, and tapped holes.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eHow do I choose the right length?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eChoose a length based on the total thickness of the materials being fastened. Short lengths (4–6 mm) suit thin panels and PCB mounting; longer lengths (16–25 mm) are better for thicker assemblies or standoff applications with a nut.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eAre the hex nuts included in the pack?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Each pack includes matching M2.5 hex nuts — one nut per screw, 20 nuts total per pack. No need to source nuts separately.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Size above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"Screw + Nut \/ M2.5×4 \/ 20set","offer_id":52260461609234,"sku":"LFLJSCS00811x1","price":2.54,"currency_code":"USD","in_stock":true},{"title":"Screw + Nut \/ M2.5×16 \/ 20set","offer_id":52260461642002,"sku":"LFLJSCS00812x1","price":2.69,"currency_code":"USD","in_stock":true},{"title":"Screw + Nut \/ M2.5×25 \/ 20set","offer_id":52260461674770,"sku":"LFLJSCS00813x1","price":2.86,"currency_code":"USD","in_stock":true},{"title":"Screw + Nut \/ M2.5×6 \/ 20set","offer_id":52260461707538,"sku":"LFLJSCS00814x1","price":2.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture2of5_14d9f72a-665f-46c1-a5f1-afe25e48d526.jpg?v=1779094606","url":"https:\/\/homediyer.com\/products\/m2-5-phillips-countersunk-flat-head-machine-screws-hex-nuts-iron-sets","provider":"HomeDIYer","version":"1.0","type":"link"}