{"product_id":"m3-phillips-countersunk-flat-head-machine-screws-carbon-steel-white-zinc","title":"100 PCS Phillips Machine Screws Countersunk Flat Head Bolts M3 Carbon Steel","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 material and surface finish are these screws?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws are made from carbon steel with an electroplated white zinc (clear zinc) finish. The white zinc plating provides corrosion resistance, oxidation resistance, and a clean silver-white appearance. The finish is environmentally compliant and lightweight.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What lengths are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Available lengths are 5 mm, 6 mm, 8 mm, and 12 mm, all in M3 thread diameter. Select your preferred length from the Thread Diameter x Length option above.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is a countersunk (flat head) screw and when should I use it?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A countersunk or flat head screw is designed to sit flush with or below the surface of the material when fully driven. This makes it ideal for applications where a smooth, flush surface is required — such as computer chassis panels, furniture, electronics enclosures, and any assembly where a protruding head would interfere with fit or appearance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What drive style do these screws use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These screws use a Phillips (cross) drive. A #1 Phillips screwdriver is typically used for M3 screws. Use the correct bit size to prevent cam-out and head damage.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What pack sizes are available?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Available pack sizes are 100, 200, 300, 500, and 1000 pieces. Choose the quantity that best matches your project scale — smaller packs for prototyping or repairs, larger packs for production runs or maintenance stock.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these screws suitable for electronics and computer assemblies?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. M3 countersunk screws are widely used in computer chassis, side panels, hard drives, optical drives, graphics cards, sound cards, and other PC components. The flat head design allows panels and covers to sit flush, which is critical for proper fit in most computer cases.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the thread pitch for M3 screws?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard M3 screws use a coarse thread pitch of 0.5 mm (M3 x 0.5). This is the default metric coarse pitch for M3 and is compatible with standard M3 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 plus the depth of the threaded hole or nut. For countersunk screws, the length is typically measured from the top of the head to the tip. As a general rule, at least 1.5x the thread diameter (4.5 mm for M3) should engage the threaded hole for a secure hold.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eM3 Phillips Countersunk Flat Head Machine Screws — Carbon Steel White Zinc, Flush-Fit Metric Fasteners for Electronics \u0026amp; DIY Assemblies\u003c\/h2\u003e\n    \u003cp\u003eWhen your assembly requires a clean, flush surface — whether it's a computer chassis panel, an electronics enclosure, or a furniture joint — a protruding screw head is more than an eyesore. It can interfere with fit, block covers, and create snag points. M3 countersunk screws solve this by sitting flush with or below the surface, keeping your build clean and professional.\u003c\/p\u003e\n    \u003cp\u003eThese Phillips countersunk flat head machine screws are precision-formed from carbon steel with an electroplated white zinc finish, providing corrosion resistance, oxidation resistance, and a clean silver-white appearance. Available in M3 thread diameter across four lengths — 5, 6, 8, and 12 mm — with pack quantities from 100 to 1000 pieces to match any project scale.\u003c\/p\u003e\n    \u003cp\u003eIdeal for computer chassis and side panels, hard drives, optical drives, graphics cards, electronics enclosures, electric toys, motorcycles, fishing gear, furniture assembly, and general DIY mechanical applications requiring a flush-fit M3 fastener.\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 M3 thread (0.5 mm pitch) · Phillips #1 drive · Countersunk (flat head) · Carbon steel \/ white zinc — compatible with standard M3 nuts, threaded inserts, and tapped holes · Suitable for electronics, computer hardware, and general mechanical assemblies\n  \u003c\/div\u003e\n\n  \u003ch2\u003e✅ Key Features of These M3 Phillips Countersunk Flat Head Machine Screws\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCarbon Steel with White Zinc Plating\u003c\/strong\u003e — Electroplated white zinc finish provides corrosion resistance, oxidation resistance, and anti-magnetic properties. Lightweight and durable with a clean silver-white appearance.\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 design sits flush with or below the surface when fully driven, eliminating protruding heads that interfere with panel fit, covers, or aesthetics. Essential for computer chassis, enclosures, and furniture.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003ePrecision Phillips Drive\u003c\/strong\u003e — Smooth, uniform cross-drive recess with evenly distributed thread force. Burr-free surface and consistent thread pitch reduce stripping risk and ensure reliable fastening.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💻\u003c\/span\u003e \u003cstrong\u003eElectronics-Ready M3 Sizing\u003c\/strong\u003e — M3 is the standard thread size for computer chassis, hard drives, optical drives, graphics cards, and PC component assemblies. Four lengths (5, 6, 8, 12 mm) cover the most common panel and component thicknesses.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📊\u003c\/span\u003e \u003cstrong\u003e5 Pack Quantity Options\u003c\/strong\u003e — Available in 100, 200, 300, 500, and 1000 pieces. Scale your order to match your project — from single repairs to full production runs — with better per-unit value at higher quantities.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003ePrecise, Uniform Threading\u003c\/strong\u003e — Deep, clear M3 x 0.5 mm pitch threads with consistent tooth spacing ensure even force distribution and a secure hold without thread stripping.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003e📐 Technical Specifications — M3 Phillips Countersunk Flat Head Machine Screws\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 — Phillips drive\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eMetric (ISO) — M3 x 0.5 mm pitch (coarse)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Diameter\u003c\/th\u003e\n\u003ctd\u003eM3 (3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e5 mm · 6 mm · 8 mm · 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003ePhillips (cross) — #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 (90° included angle, flush-fit)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCarbon Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eSurface Treatment\u003c\/th\u003e\n\u003ctd\u003eElectroplated White Zinc (clear zinc)\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 Quantities\u003c\/th\u003e\n\u003ctd\u003e100 · 200 · 300 · 500 · 1000 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eComputer chassis, side panels, hard drives, optical drives, graphics cards, electronics enclosures, electric toys, motorcycles, fishing gear, furniture, general DIY 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 material and surface finish are these screws?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws are made from carbon steel with an electroplated white zinc (clear zinc) finish. The white zinc plating provides corrosion resistance, oxidation resistance, and a clean silver-white appearance. The finish is environmentally compliant and lightweight.\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 5 mm, 6 mm, 8 mm, and 12 mm, all in M3 thread diameter. Select your preferred length from the Thread Diameter x Length option above.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat is a countersunk (flat head) screw and when should I use it?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA countersunk or flat head screw is designed to sit flush with or below the surface of the material when fully driven. This makes it ideal for applications where a smooth, flush surface is required — such as computer chassis panels, furniture, electronics enclosures, and any assembly where a protruding head would interfere with fit or appearance.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat drive style do these screws use?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese screws use a Phillips (cross) drive. A #1 Phillips screwdriver is typically used for M3 screws. Use the correct bit size to prevent cam-out and head damage.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat pack sizes are available?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAvailable pack sizes are 100, 200, 300, 500, and 1000 pieces. Choose the quantity that best matches your project scale — smaller packs for prototyping or repairs, larger packs for production runs or maintenance stock.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eAre these screws suitable for electronics and computer assemblies?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. M3 countersunk screws are widely used in computer chassis, side panels, hard drives, optical drives, graphics cards, sound cards, and other PC components. The flat head design allows panels and covers to sit flush, which is critical for proper fit in most computer cases.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n    \u003cdetails\u003e\u003csummary\u003eWhat is the thread pitch for M3 screws?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard M3 screws use a coarse thread pitch of 0.5 mm (M3 x 0.5). This is the default metric coarse pitch for M3 and is compatible with standard M3 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 plus the depth of the threaded hole or nut. For countersunk screws, the length is typically measured from the top of the head to the tip. As a general rule, at least 1.5x the thread diameter (4.5 mm for M3) should engage the threaded hole for a secure hold.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your Thread Diameter x Length and Amount above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3 x 5 mm \/ 100 PCS","offer_id":52260477927698,"sku":"GYJLTJLWJ00371x1","price":8.5,"currency_code":"USD","in_stock":true},{"title":"M3 x 6 mm \/ 100 PCS","offer_id":52260477960466,"sku":"GYJLTJLWJ00372x1","price":10.17,"currency_code":"USD","in_stock":true},{"title":"M3 x 8 mm \/ 100 PCS","offer_id":52260477993234,"sku":"GYJLTJLWJ00373x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"M3 x 12 mm \/ 100 PCS","offer_id":52260478026002,"sku":"GYJLTJLWJ00374x1","price":12.21,"currency_code":"USD","in_stock":true},{"title":"M3 x 5 mm \/ 200 PCS","offer_id":52260478058770,"sku":"GYJLTJLWJ00371x2","price":13.57,"currency_code":"USD","in_stock":true},{"title":"M3 x 6 mm \/ 200 PCS","offer_id":52260478091538,"sku":"GYJLTJLWJ00372x2","price":14.39,"currency_code":"USD","in_stock":true},{"title":"M3 x 8 mm \/ 200 PCS","offer_id":52260478124306,"sku":"GYJLTJLWJ00373x2","price":17.54,"currency_code":"USD","in_stock":true},{"title":"M3 x 12 mm \/ 200 PCS","offer_id":52260478157074,"sku":"GYJLTJLWJ00374x2","price":22.44,"currency_code":"USD","in_stock":true},{"title":"M3 x 5 mm \/ 300 PCS","offer_id":52260478189842,"sku":"GYJLTJLWJ00371x3","price":19.28,"currency_code":"USD","in_stock":true},{"title":"M3 x 6 mm \/ 300 PCS","offer_id":52260478222610,"sku":"GYJLTJLWJ00372x3","price":20.64,"currency_code":"USD","in_stock":true},{"title":"M3 x 8 mm \/ 300 PCS","offer_id":52260478255378,"sku":"GYJLTJLWJ00373x3","price":25.27,"currency_code":"USD","in_stock":true},{"title":"M3 x 12 mm \/ 300 PCS","offer_id":52260478288146,"sku":"GYJLTJLWJ00374x3","price":32.61,"currency_code":"USD","in_stock":true},{"title":"M3 x 5 mm \/ 500 PCS","offer_id":52260478320914,"sku":"GYJLTJLWJ00371x5","price":30.98,"currency_code":"USD","in_stock":true},{"title":"M3 x 6 mm \/ 500 PCS","offer_id":52260478353682,"sku":"GYJLTJLWJ00372x5","price":33.16,"currency_code":"USD","in_stock":true},{"title":"M3 x 8 mm \/ 500 PCS","offer_id":52260478386450,"sku":"GYJLTJLWJ00373x5","price":40.94,"currency_code":"USD","in_stock":true},{"title":"M3 x 12 mm \/ 500 PCS","offer_id":52260478419218,"sku":"GYJLTJLWJ00374x5","price":53.28,"currency_code":"USD","in_stock":true},{"title":"M3 x 5 mm \/ 1000 PCS","offer_id":52260478451986,"sku":"GYJLTJLWJ00371x10","price":59.98,"currency_code":"USD","in_stock":true},{"title":"M3 x 6 mm \/ 1000 PCS","offer_id":52260478484754,"sku":"GYJLTJLWJ00372x10","price":64.44,"currency_code":"USD","in_stock":true},{"title":"M3 x 8 mm \/ 1000 PCS","offer_id":52260478517522,"sku":"GYJLTJLWJ00373x10","price":80.1,"currency_code":"USD","in_stock":true},{"title":"M3 x 12 mm \/ 1000 PCS","offer_id":52260478550290,"sku":"GYJLTJLWJ00374x10","price":104.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_5e164f3c-1ecf-478c-8b54-2a3c97e0974b.jpg?v=1779091264","url":"https:\/\/homediyer.com\/products\/m3-phillips-countersunk-flat-head-machine-screws-carbon-steel-white-zinc","provider":"HomeDIYer","version":"1.0","type":"link"}