{"product_id":"zinc-plated-phillips-flat-head-machine-screws","title":"Zinc Plated Phillips Flat Head Machine Screws — #4-40 to #10-32, Multiple Lengths","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eZinc Plated Phillips Flat Head Machine Screws — Flush Fit for Clean, Secure Assemblies\u003c\/h2\u003e\n\u003cp\u003eWhether you're assembling electronics enclosures, securing panels on machinery, or building out a DIY project that demands a clean, flush finish, finding the right countersunk machine screw in the exact size you need can be frustrating. These zinc-plated Phillips flat-head machine screws are stocked in a wide range of unified inch thread sizes — from #4-40 through #10-32 — so hobbyists, technicians, and small shop operators can grab exactly what they need without over-ordering.\u003c\/p\u003e\n\u003cp\u003eEach pack contains either 50 or 100 identical screws. Available thread sizes include #4-40, #6-32, #8-32, #10-24, and #10-32, with lengths ranging from 5\/16\" (≈8mm) up to 2\" (≈51mm) depending on the size selected. The flat countersunk head is designed to sit flush with or below the surface of the mating material when installed in a properly prepared countersunk hole. The zinc plating provides a bright finish and moderate corrosion resistance for everyday indoor and light-duty applications.\u003c\/p\u003e\n\u003cp\u003eThese screws are well-suited for electronics and electrical panel assembly, light fabrication and sheet metal work, plastic enclosure and housing assembly, and general machine maintenance tasks where a flush-mount fastener is required. Long-tail use cases include replacing stripped countersunk screws in control boxes, sourcing bulk Phillips flat head machine screws for production runs, and finding fine-thread #10-32 screws for instrument panels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eThread Compatibility:\u003c\/strong\u003e These screws follow the Unified National Thread Standard (UNC\/UNF). Ensure your nuts, inserts, or tapped holes match the selected thread size and pitch before ordering. #6-32 and #10-24 are coarse thread (UNC); #8-32 and #10-32 are fine thread (UNF).\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Zinc Plated Phillips 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\u003cspan\u003e\u003cstrong\u003ePhillips Drive for Fast Installation\u003c\/strong\u003e — The cross-recess Phillips head works with standard #1 and #2 Phillips bits, making these screws compatible with virtually every power driver and screwdriver set in the shop.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eCountersunk Flat Head for Flush Mounting\u003c\/strong\u003e — The 82° flat head countersink angle is the US standard, allowing the screw to sit flush or below the surface in a properly drilled countersink — ideal for panel assembly and enclosure work.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eZinc Plated Finish for Corrosion Resistance\u003c\/strong\u003e — The electroplated zinc coating provides a protective barrier against oxidation, extending service life in indoor and low-humidity environments compared to bare steel fasteners.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eMulti-Size Range in One Listing\u003c\/strong\u003e — Covering five thread designations (#4-40, #6-32, #8-32, #10-24, #10-32) and lengths from 5\/16\" to 2\", this listing lets you source multiple sizes without hunting across different suppliers.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eUnified Inch Thread Standard (UNC\/UNF)\u003c\/strong\u003e — Fully compatible with standard US inch-thread nuts, threaded inserts, and tapped holes — no metric conversion needed for American-spec equipment and fixtures.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🗂️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBulk Pack Options (50 or 100 pcs)\u003c\/strong\u003e — Choose the pack size that fits your project. The 100-piece packs are ideal for production or stocking your parts bin; 50-piece packs work well for smaller repairs and one-off builds.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Phillips 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\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003ePhillips Flat Head (Countersunk) Machine Screws\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Type\u003c\/th\u003e\n\u003ctd\u003ePhillips (Cross Recess)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eFlat \/ Countersunk (82° included angle, US standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Sizes Available\u003c\/th\u003e\n\u003ctd\u003e#4-40, #6-32, #8-32, #10-24, #10-32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eUnified National Coarse (UNC) and Fine (UNF)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength Range\u003c\/th\u003e\n\u003ctd\u003e5\/16\" (≈8mm) to 2\" (≈51mm) — varies by thread size; see variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eSteel with zinc electroplating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eZinc plated (bright)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantities\u003c\/th\u003e\n\u003ctd\u003e50 pcs or 100 pcs per pack (select via Packing Qty option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Driver Bit\u003c\/th\u003e\n\u003ctd\u003e#1 Phillips for #4–#6; #2 Phillips for #8–#10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eModerate — suitable for indoor and light-duty dry environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength\u003c\/th\u003e\n\u003ctd\u003eSee variant options \/ Contact us to confirm for specific grades\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eHeads up:\u003c\/strong\u003e These are standard machine screws — they require a pre-tapped hole, threaded insert, or matching nut. They are \u003cem\u003enot\u003c\/em\u003e self-tapping. If you are unsure which size is best for your application, please contact us before ordering.\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right screw length?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA general rule of thumb is to select a length that is 2–3 times the thickness of the material being fastened. For example, when joining 1\/4\" (6mm) sheet metal or plastic panels, a 1\/2\" to 3\/4\" screw is typically appropriate. Always account for the countersink depth so the flat head sits flush with the surface. If you are threading into a nut or insert, make sure enough thread engagement remains after passing through the material — generally at least 1.5× the screw diameter in thread engagement is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these screws use, and are they compatible with standard US nuts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws follow the Unified National Thread Standard used throughout the United States and Canada. #6-32 and #10-24 are UNC (coarse thread); #8-32 and #10-32 are UNF (fine thread). They are fully compatible with standard US inch-thread hex nuts, wing nuts, threaded inserts, and tapped holes of the matching size and pitch. They are \u003cem\u003enot\u003c\/em\u003e compatible with metric threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan these screws be used outdoors or in humid environments?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe zinc plating provides moderate corrosion resistance, making these screws suitable for indoor use and light-duty outdoor applications in dry or low-humidity conditions. They are generally not recommended for prolonged exposure to rain, salt spray, or marine environments. For those conditions, stainless steel fasteners are typically a better choice. If you need guidance on the right material for your environment, feel free to contact us.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat materials can I use these machine screws with?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws are designed for use with metal, hard plastic, fiberglass, and composite panels where a pre-tapped hole or matching nut is used. Common applications include electronics enclosures, electrical panels, aluminum extrusions, and plastic housings. They are \u003cem\u003enot\u003c\/em\u003e self-tapping — the receiving material must already have a properly sized threaded hole or be used with a nut or threaded insert.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between #10-24 and #10-32, and can I use them interchangeably?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBoth are #10 diameter screws (approximately 0.190\" \/ 4.8mm shank diameter), but they have different thread pitches. #10-24 has 24 threads per inch (coarse thread, UNC), while #10-32 has 32 threads per inch (fine thread, UNF). They are \u003cem\u003enot\u003c\/em\u003e interchangeable — forcing the wrong thread into a tapped hole will strip the threads. Always verify the thread pitch of your existing hole or nut before selecting a size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat driver bit size do I need for these screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA #1 Phillips bit is generally used for #4-40 and #6-32 screws, while a #2 Phillips bit is typically used for #8-32, #10-24, and #10-32 screws. Using the correct bit size is important — an undersized bit can cam out and damage the screw head, while an oversized bit may not seat properly. We recommend using a bit with a good fit and applying steady downward pressure during driving.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these screws, and are they suitable for structural applications?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eZinc plated steel machine screws generally offer good tensile and shear strength for light-to-medium duty fastening applications such as panel assembly, electronics enclosures, and general fabrication. Exact load ratings depend on the base steel grade. These screws are typically not rated for primary structural or safety-critical load-bearing applications. If you need specific tensile strength data for your application, please contact us to confirm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to use a washer with these flat head screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIn most cases, flat head countersunk screws are designed to bear directly against the countersink in the material, so a washer under the head is not typically used. However, a flat washer or lock washer can be used under a nut on the opposite side of the joint to distribute load and prevent loosening, especially in vibration-prone applications. If the material is soft (such as thin plastic), a backing washer on the nut side is generally recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your \u003cstrong\u003esize and quantity\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"6#-32*3\/8 \/ 100pcs","offer_id":52285048357138,"sku":"LFL2024TENGLUOWJ05278x100","price":4.76,"currency_code":"USD","in_stock":true},{"title":"6#-32*1\/2 \/ 100pcs","offer_id":52285048389906,"sku":"LFL2024TENGLUOWJ05279x100","price":5.78,"currency_code":"USD","in_stock":true},{"title":"6#-32*5\/8 \/ 100pcs","offer_id":52285048422674,"sku":"LFL2024TENGLUOWJ05280x100","price":6.7,"currency_code":"USD","in_stock":true},{"title":"6#-32*3\/4 \/ 100pcs","offer_id":52285048455442,"sku":"LFL2024TENGLUOWJ05281x100","price":7.49,"currency_code":"USD","in_stock":true},{"title":"6#-32*1 \/ 100pcs","offer_id":52285048488210,"sku":"LFL2024TENGLUOWJ05282x100","price":9.15,"currency_code":"USD","in_stock":true},{"title":"8#-32*5\/16 \/ 100pcs","offer_id":52285048520978,"sku":"LFL2024TENGLUOWJ05283x100","price":5.22,"currency_code":"USD","in_stock":true},{"title":"8#-32*3\/8 \/ 100pcs","offer_id":52285048553746,"sku":"LFL2024TENGLUOWJ05284x100","price":5.94,"currency_code":"USD","in_stock":true},{"title":"8#-32*1\/2 \/ 100pcs","offer_id":52285048586514,"sku":"LFL2024TENGLUOWJ05285x100","price":7.22,"currency_code":"USD","in_stock":true},{"title":"8#-32*5\/8 \/ 100pcs","offer_id":52285048619282,"sku":"LFL2024TENGLUOWJ05286x100","price":8.3,"currency_code":"USD","in_stock":true},{"title":"8#-32*3\/4 \/ 100pcs","offer_id":52285048652050,"sku":"LFL2024TENGLUOWJ05287x100","price":9.6,"currency_code":"USD","in_stock":true},{"title":"8#-32*1 \/ 100pcs","offer_id":52285048684818,"sku":"LFL2024TENGLUOWJ05288x100","price":12.09,"currency_code":"USD","in_stock":true},{"title":"8#-32*1-1\/4 \/ 100pcs","offer_id":52285048717586,"sku":"LFL2024TENGLUOWJ05289x100","price":14.35,"currency_code":"USD","in_stock":true},{"title":"8#-32*1-1\/2 \/ 100pcs","offer_id":52285048750354,"sku":"LFL2024TENGLUOWJ05290x100","price":16.71,"currency_code":"USD","in_stock":true},{"title":"10#-24*3\/8 \/ 50pcs","offer_id":52285048783122,"sku":"LFL2024TENGLUOWJ05291x50","price":4.46,"currency_code":"USD","in_stock":true},{"title":"10#-24*1\/2 \/ 50pcs","offer_id":52285048815890,"sku":"LFL2024TENGLUOWJ05292x50","price":5.37,"currency_code":"USD","in_stock":true},{"title":"10#-24*5\/8 \/ 50pcs","offer_id":52285048848658,"sku":"LFL2024TENGLUOWJ05293x50","price":6.3,"currency_code":"USD","in_stock":true},{"title":"10#-24*3\/4 \/ 50pcs","offer_id":52285048881426,"sku":"LFL2024TENGLUOWJ05294x50","price":7.22,"currency_code":"USD","in_stock":true},{"title":"10#-24*1-1\/4 \/ 50pcs","offer_id":52285048914194,"sku":"LFL2024TENGLUOWJ05295x50","price":10.27,"currency_code":"USD","in_stock":true},{"title":"10#-24*1-1\/2 \/ 50pcs","offer_id":52285048946962,"sku":"LFL2024TENGLUOWJ05296x50","price":12.04,"currency_code":"USD","in_stock":true},{"title":"10#-32*5\/16 \/ 50pcs","offer_id":52285048979730,"sku":"LFL2024TENGLUOWJ05297x50","price":4.76,"currency_code":"USD","in_stock":true},{"title":"10#-32*3\/8 \/ 50pcs","offer_id":52285049012498,"sku":"LFL2024TENGLUOWJ05298x50","price":5.32,"currency_code":"USD","in_stock":true},{"title":"10#-32*1\/2 \/ 50pcs","offer_id":52285049045266,"sku":"LFL2024TENGLUOWJ05299x50","price":6.39,"currency_code":"USD","in_stock":true},{"title":"10#-32*5\/8 \/ 50pcs","offer_id":52285049078034,"sku":"LFL2024TENGLUOWJ05300x50","price":7.17,"currency_code":"USD","in_stock":true},{"title":"10#-32*3\/4 \/ 50pcs","offer_id":52285049110802,"sku":"LFL2024TENGLUOWJ05301x50","price":8.09,"currency_code":"USD","in_stock":true},{"title":"10#-32*1 \/ 50pcs","offer_id":52285049143570,"sku":"LFL2024TENGLUOWJ05302x50","price":10.12,"currency_code":"USD","in_stock":true},{"title":"10#-32*1-1\/4 \/ 50pcs","offer_id":52285049176338,"sku":"LFL2024TENGLUOWJ05303x50","price":11.94,"currency_code":"USD","in_stock":true},{"title":"10#-32*1-1\/2 \/ 50pcs","offer_id":52285049209106,"sku":"LFL2024TENGLUOWJ05304x50","price":13.75,"currency_code":"USD","in_stock":true},{"title":"10#-32*1-3\/4 \/ 50pcs","offer_id":52285049241874,"sku":"LFL2024TENGLUOWJ05305x50","price":15.26,"currency_code":"USD","in_stock":true},{"title":"10#-32*2 \/ 50pcs","offer_id":52285049274642,"sku":"LFL2024TENGLUOWJ05306x50","price":17.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_bdee1296-1259-44a7-a243-edc2d6361eb3.jpg?v=1780503488","url":"https:\/\/homediyer.com\/products\/zinc-plated-phillips-flat-head-machine-screws","provider":"HomeDIYer","version":"1.0","type":"link"}