{"product_id":"black-304-stainless-phillips-truss-head-machine-screws-m3-m4-m5-m6","title":"Black 304 Stainless Steel Phillips Truss Head Machine Screws — M3 M4 M5 M6","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBlack Phillips Truss Head Machine Screws — Wide-Head Grip for Thin Materials\u003c\/h2\u003e\n\u003cp\u003eWhen a standard pan head screw just doesn't spread the load enough — or when you need a fastener that looks clean and sits low — most builders and makers end up hunting for a truss head. Whether you're assembling electronics enclosures, securing sheet metal panels, building RC frames, or mounting thin acrylic or aluminum stock, the wrong head geometry causes pull-through, wobble, or an ugly finish. These black 304 stainless steel Phillips truss head machine screws are stocked specifically for those jobs.\u003c\/p\u003e\n\u003cp\u003eEach pack contains fully threaded metric machine screws in your chosen size and quantity. Available in M3, M4, M5, and M6 diameters with lengths ranging from 4mm (≈5\/32\") to 50mm (≈1-31\/32\"). The truss head features a wide, low-profile dome with a flat underside for maximum bearing surface. Material is 304 stainless steel with a black finish for a clean, corrosion-resistant appearance. Pack quantities range from 5 to 50 pieces, depending on the size selected.\u003c\/p\u003e\n\u003cp\u003eTypical applications include electronics chassis assembly, DIY enclosure fabrication, light sheet metal fastening, 3D printer frame construction, and hobby or RC vehicle builds where a low-profile black fastener is needed. These black metric machine screws are a go-to for makers who want function and a finished look in one fastener.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e ISO metric thread standard — fits standard metric nuts, threaded inserts, and tapped holes in M3, M4, M5, and M6. Phillips drive (PH1 for M3–M4, PH2 for M5–M6).\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These Black Truss 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\u003eWide Low-Profile Truss Head\u003c\/strong\u003e — The broad, flat-bottomed dome distributes clamping load over a larger surface area, reducing pull-through risk on thin panels and soft substrates.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFull Metric Thread Range\u003c\/strong\u003e — Available in M3, M4, M5, and M6 diameters with lengths from 4mm to 50mm, covering the most common metric machine screw sizes for electronics and light fabrication.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🖤\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eBlack Finish for Clean Aesthetics\u003c\/strong\u003e — The black surface treatment gives these stainless steel truss head screws a finished, professional look — ideal for visible fastener applications in enclosures, panels, and frames.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e304 Stainless Steel Construction\u003c\/strong\u003e — 304 stainless provides solid corrosion resistance for indoor, humid, and light outdoor environments without the brittleness of lower-grade steel fasteners.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePhillips Drive for Fast Installation\u003c\/strong\u003e — Compatible with standard PH1 and PH2 bits, making these screws easy to drive with any power drill or hand screwdriver — no specialty tools required.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Choose from 5, 10, 20, or 50 pieces per pack to match your project scale — whether you need a small handful for a one-off build or a larger batch for production runs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — Phillips Truss Head Machine Screws\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack (black oxide \/ black passivation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Type\u003c\/th\u003e\n\u003ctd\u003eTruss Head (wide low-profile dome)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Type\u003c\/th\u003e\n\u003ctd\u003ePhillips (PH1 for M3–M4; PH2 for M5–M6)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eISO Metric (coarse pitch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Diameters\u003c\/th\u003e\n\u003ctd\u003eM3, M4, M5, M6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e4mm (≈5\/32\") – 50mm (≈1-31\/32\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Type\u003c\/th\u003e\n\u003ctd\u003eFully threaded machine screw\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity Options\u003c\/th\u003e\n\u003ctd\u003e5 \/ 10 \/ 20 \/ 50 pcs (varies by size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTensile Strength\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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\u003eNote:\u003c\/strong\u003e Always verify thread pitch and hole diameter before ordering. These are machine screws requiring a pre-tapped hole or nut — they are not self-tapping.\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 length for my truss head machine screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eGenerally, the screw length should equal the thickness of the material being fastened plus enough thread engagement in the receiving part — typically 1.5× the screw diameter. For example, fastening a 3mm panel with an M4 screw into a tapped hole generally calls for a length of 8–12mm (≈5\/16\"–15\/32\"). Use the variant selector above to pick your size and length combination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat material are these screws made from?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws are made from 304 stainless steel with a black finish. 304 stainless is an austenitic alloy that offers good corrosion resistance in most indoor and light outdoor environments. It is non-magnetic in its annealed state and widely used in electronics, food equipment, and general fabrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these screws suitable for outdoor or marine use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003e304 stainless steel generally performs well in light outdoor and humid environments. For harsh marine or highly corrosive conditions, 316 stainless steel is typically recommended. The black finish may show minor wear over time with prolonged outdoor exposure. For most sheltered outdoor applications, these will generally hold up well.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat thread standard do these screws follow — are they compatible with standard metric nuts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. These are ISO metric coarse-pitch machine screws (M3, M4, M5, M6). They are compatible with standard metric nuts, threaded inserts, and tapped holes of the corresponding size. They are not compatible with UNC\/UNF (inch) threads.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the advantage of a truss head compared to a pan head or flat head?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA truss head has a wider, lower-profile dome compared to a pan head, giving it a larger bearing surface that distributes clamping force over a greater area. This makes it well-suited for thin or soft materials where a smaller head might pull through. Unlike a flat head, it sits slightly above the surface rather than flush — so no countersinking is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat screwdriver bit size do I need?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese screws use a Phillips drive. For M3 and M4 sizes, a PH1 bit is typically the correct fit. For M5 and M6, a PH2 bit is generally recommended. Always use a properly sized bit to avoid cam-out and head damage — especially important with smaller M3 screws.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many pieces come in each pack, and can I order larger quantities?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003ePack quantity depends on the size and length selected — options include 5, 10, 20, or 50 pieces per pack. The quantity is shown in the \"Qty (pcs)\" variant selector. If you need quantities beyond what's listed, please contact us to discuss bulk pricing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if I need a machine screw or a self-tapping screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMachine screws like these require a pre-tapped hole or a nut — they do not cut their own threads. If you're fastening into a pre-threaded metal insert, a nut, or a tapped hole, a machine screw is the correct choice. If you're driving directly into plastic, wood, or sheet metal without a pre-tapped hole, you would typically need a self-tapping or thread-forming screw instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3*4mm \/ 50","offer_id":52254056055058,"sku":"CXH16331x50","price":3.58,"currency_code":"USD","in_stock":true},{"title":"M3*5mm \/ 50","offer_id":52254056087826,"sku":"CXH16332x50","price":3.58,"currency_code":"USD","in_stock":true},{"title":"M3*6mm \/ 50","offer_id":52254056120594,"sku":"CXH16333x50","price":3.88,"currency_code":"USD","in_stock":true},{"title":"M3*8mm \/ 50","offer_id":52254056153362,"sku":"CXH16334x50","price":3.63,"currency_code":"USD","in_stock":true},{"title":"M3*10mm \/ 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