{"product_id":"m4-ultra-thin-flat-wafer-head-screws","title":"M4 Ultra Thin Flat Wafer Head Phillips Screws – Nickel or Black Zinc Plated, Carbon Steel (6–16mm Lengths)","description":"\u003c!-- Part 1: Product Description HTML for Shopify --\u003e\n\u003cdiv class=\"hdiy-ultra-thin-wafer\"\u003e\n\u003c!-- Product Overview Section --\u003e\n\u003ch2\u003e🔩 M4 Ultra Thin Flat Wafer Head Phillips Screws – Nickel or Black Zinc Plated, Carbon Steel\u003c\/h2\u003e\n\u003cp\u003eYou’re working on a laptop, a tablet, or a slim electronic enclosure – and a standard pan head screw would stick out too far. These M4 flat wafer head screws are ultra‑thin, with a wide, low‑profile head that sits almost flush with the surface. The Phillips drive gives you reliable engagement, and the head shape distributes clamping force evenly without the need for countersinking. Made from carbon steel with your choice of nickel or black zinc plating, they resist corrosion and look clean. Available in lengths from 6mm to 16mm (under head). Fully threaded for maximum grip. Ideal for thin metal panels, plastic casings, and any application where head height is critical.\u003c\/p\u003e\n\u003c!-- Features Section --\u003e\n\u003ch2\u003e✨ Key Features – Ultra Thin Flat Wafer Head Phillips Screws\u003c\/h2\u003e\n\u003cul class=\"hdiy-feature-list\"\u003e\n\u003cli\u003e🔘 \u003cstrong\u003eUltra‑thin flat wafer head\u003c\/strong\u003e – Extremely low profile (head height ~0.8‑1.2mm). Wide bearing surface for even load distribution.\u003c\/li\u003e\n\u003cli\u003e📏\u003cbr\u003e\u003cstrong\u003ePhillips drive\u003c\/strong\u003e – Standard cross recess fits common screwdrivers. Easy to drive by hand or with power tools.\u003c\/li\u003e\n\u003cli\u003e🎨 \u003cstrong\u003eNickel or black zinc plating\u003c\/strong\u003e – Choose bright nickel for a classic silver finish or black zinc for a matte, low‑glare look. Both add corrosion resistance.\u003c\/li\u003e\n\u003cli\u003e📏 \u003cstrong\u003eM4 metric thread (4mm diameter)\u003c\/strong\u003e – Popular size for electronics, appliances, and light machinery.\u003c\/li\u003e\n\u003cli\u003e📐 \u003cstrong\u003eLengths from 6mm to 16mm (under head)\u003c\/strong\u003e – Fully threaded for maximum grip in thin materials.\u003c\/li\u003e\n\u003cli\u003e💪 \u003cstrong\u003eCarbon steel (Grade 2 \/ Grade 4.8 equivalent)\u003c\/strong\u003e – Strong and durable. Zinc layer provides rust protection for indoor and light outdoor use.\u003c\/li\u003e\n\u003cli\u003e📦 \u003cstrong\u003eMultiple pack quantities\u003c\/strong\u003e – Choose from 30, 100, 200, or 400 pieces per pack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Specifications Table --\u003e\n\u003ch2\u003e📏 Specifications – M4 Ultra Thin Flat Wafer Head Screws (Length Under Head)\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto;\" class=\"hdiy-table-wrapper\"\u003e\n\u003ctable class=\"hdiy-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Diameter\u003c\/th\u003e\n\u003cth\u003eThread Pitch (mm)\u003c\/th\u003e\n\u003cth\u003eLength (mm, under head) *\u003c\/th\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003cth\u003eDrive\u003c\/th\u003e\n\u003cth\u003eFinish Options\u003c\/th\u003e\n\u003cth\u003ePack Sizes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f5f5f5; text-align: center;\" colspan=\"7\"\u003e📐 Length measured from underside of head to tip. Fully threaded. Select length, finish, and pack size from dropdown.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"hdiy-table-row\"\u003e\n\u003ctd class=\"dia\"\u003eM4\u003c\/td\u003e\n\u003ctd class=\"pitch\"\u003e0.7\u003c\/td\u003e\n\u003ctd class=\"len\"\u003e6, 8, 10, 12, 14, 16\u003c\/td\u003e\n\u003ctd rowspan=\"1\"\u003eUltra thin flat wafer head\u003c\/td\u003e\n\u003ctd rowspan=\"1\"\u003ePhillips\u003c\/td\u003e\n\u003ctd rowspan=\"1\"\u003eNickel plated or black zinc plated\u003c\/td\u003e\n\u003ctd rowspan=\"1\"\u003e30 \/ 100 \/ 200 \/ 400\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 0.85rem; margin-top: 0.5rem;\" class=\"hdiy-note\"\u003e* Lengths are typical – exact availability may vary. Please allow minor manual measurement errors. Head height is approximately 0.8–1.2mm – significantly lower than standard pan head screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Application \u0026 Finish Table --\u003e\n\u003ch2\u003e📋 Finish Options \u0026amp; Typical Applications\u003c\/h2\u003e\n\u003cdiv style=\"overflow-x: auto;\" class=\"hdiy-table-wrapper\"\u003e\n\u003ctable class=\"hdiy-specs-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003cth\u003eAppearance\u003c\/th\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"hdiy-table-row\"\u003e\n\u003ctd class=\"pro\"\u003eNickel plated\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eBright silver, slightly shiny\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eGood – indoor use, light moisture\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eLaptops, consumer electronics, visible hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"hdiy-table-row\"\u003e\n\u003ctd class=\"pro\"\u003eBlack zinc plated\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eMatte black, low glare\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eModerate – indoor use, light moisture\u003c\/td\u003e\n\u003ctd class=\"desc\"\u003eIndustrial equipment, dark enclosures, automotive trim\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ Section – all expanded --\u003e\n\u003ch2\u003e❓ Frequently Asked Questions – M4 Ultra Thin Flat Wafer Head Screws\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e1. How do I measure the length of a flat wafer head screw?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eFor flat wafer head screws, length is measured from the underside of the head (the flat bearing surface) to the tip. The head itself is NOT included. So an “M4 x 8mm” screw has an 8mm long threaded shaft under the head.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e2. Do I need to countersink the hole for these screws?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eNo – wafer head screws are designed to sit on top of the surface. Their ultra‑thin profile provides a clean, low‑profile finish without countersinking. Just drill a clearance or pilot hole and drive the screw.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e3. Are these screws fully threaded?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eYes – all M4 screws in this range (6–16mm length) are fully threaded from under the head to the tip, giving you maximum grip in shallow holes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e4. Will the nickel or black zinc finish rust? Can I use these outdoors?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eBoth finishes provide good corrosion resistance for indoor use and occasional light outdoor exposure. For continuous outdoor or marine environments, we recommend stainless steel screws. For most electronics, appliances, and indoor machinery, these are perfectly adequate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e5. What screwdriver do I need for M4 Phillips screws?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eUse a #1 or #2 Phillips screwdriver. A #2 is more common for M4. Always use a driver that fits snugly to avoid cam‑out and head damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq-item\"\u003e\n\u003cp class=\"hdiy-faq-question\"\u003e\u003cstrong\u003e6. Can I use these screws with a nut? What size nut fits?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"hdiy-faq-answer\"\u003eYes – these are machine screws. Use a standard M4 metric nut (0.7mm pitch). They will also thread into pre‑tapped M4 holes. For wood or plastic, use a threaded insert or a nut on the back.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  .hdiy-ultra-thin-wafer {\n    max-width: 100%;\n    margin: 0;\n    padding: 0;\n    color: #1a1a1a;\n    line-height: 1.5;\n  }\n  .hdiy-ultra-thin-wafer h2 {\n    font-size: 1.75rem;\n    margin: 1.5rem 0 0.75rem 0;\n    font-weight: 600;\n    border-bottom: 2px solid #eaeaea;\n    padding-bottom: 0.5rem;\n  }\n  .hdiy-ultra-thin-wafer h2:first-of-type {\n    margin-top: 0;\n  }\n  .hdiy-ultra-thin-wafer p {\n    margin-bottom: 1rem;\n    font-size: 1rem;\n  }\n  .hdiy-feature-list {\n    list-style: none;\n    padding-left: 0;\n    margin: 1rem 0;\n  }\n  .hdiy-feature-list li {\n    margin-bottom: 0.75rem;\n    padding-left: 0.25rem;\n    font-size: 1rem;\n    display: flex;\n    align-items: flex-start;\n    gap: 0.5rem;\n  }\n  .hdiy-feature-list li strong {\n    font-weight: 600;\n  }\n  .hdiy-table-wrapper {\n    margin: 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