{"product_id":"a2-304-stainless-pan-head-security-torx-machine-screws-m2-m4-tamper-resistant","title":"A2 304 Stainless Steel Pan Head Security Torx Machine Screws M2 M2.5 M3 M4 — Tamper-Resistant, 4mm to 20mm, Pack of 20","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eA2 304 Stainless Steel Pan Head Security Torx Machine Screws M2–M4 — Tamper-Resistant Fasteners for Electronics, Enclosures \u0026amp; Anti-Theft Installations\u003c\/h2\u003e\n\u003cp\u003eStandard screws invite tampering. Whether you’re securing electronics enclosures, public fixtures, or anti-theft installations, a fastener that can’t be removed with a common screwdriver is a meaningful deterrent. These \u003cstrong\u003eA2 304 stainless steel pan head Security Torx machine screws\u003c\/strong\u003e use a pin-in Torx (TR) drive that requires a specialized Security Torx driver — standard Torx bits will not engage due to the center pin. The natural stainless finish provides corrosion resistance without the added cost of a black oxide coating.\u003c\/p\u003e\n\u003cp\u003eThe pan head profile provides a wide, flat bearing surface that distributes clamping force evenly across panels and housings. Available in M2, M2.5, M3, and M4 with 24 size combinations from M2×4mm (0.16”) to M4×20mm (0.79”). Each pack contains 20 pieces — select your preferred size using the Size option above.\u003c\/p\u003e\n\u003cp\u003eTypical applications include electronics enclosures and device security (M2–M3), public fixture and display hardware (M3–M4), anti-theft installations and access panels, kiosk and vending machine assembly, and any application where unauthorized removal of fasteners must be prevented.\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 — M2, M2.5, M3, M4. Security Torx (TR \/ pin-in Torx) drive — TR6 (M2) \/ TR8 (M2.5) \/ TR10 (M3) \/ TR15 (M4). Requires a pre-tapped hole or a matching metric nut. Not self-tapping. Standard Torx (T) drivers will NOT fit.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-note\"\u003e\n\u003cspan class=\"hdiy-note-icon\"\u003e⚠️\u003c\/span\u003e \u003cstrong\u003eNote:\u003c\/strong\u003e A Security Torx (TR) driver with a center hole is required — standard Torx (T) drivers will not engage due to the center pin. Screw length is measured \u003cem\u003eexcluding the head\u003c\/em\u003e. All sizes are sold in packs of 20 pieces.\u003c\/div\u003e\n\u003ch2\u003e✅ Key Features of These A2 Stainless Pan Head Security Torx Machine Screws M2–M4\u003c\/h2\u003e\n\u003cul class=\"hdiy-features\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔒\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eSecurity Torx (TR) Drive\u003c\/strong\u003e — Pin-in Torx center prevents standard Torx drivers from engaging; requires a specialized TR driver — a meaningful deterrent against unauthorized removal in public, commercial, and sensitive installations.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePan Head Profile\u003c\/strong\u003e — Wide, flat bearing surface distributes clamping force evenly; low-profile head suits panels, electronics enclosures, and plastic housings without digging in.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧄\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eA2 (304) Stainless Steel\u003c\/strong\u003e — Austenitic stainless with excellent corrosion resistance; no rust, no plating to chip or flake — suitable for indoor and light outdoor use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e24 Size Combinations\u003c\/strong\u003e — M2 through M4 in lengths from 4mm (0.16”) to 20mm (0.79”); covers micro electronics security through medium panel anti-tamper fastening in a single listing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003ePack of 20\u003c\/strong\u003e — Each size ships in a pack of 20 pieces; suitable for small installations, repair stock, and workshop use.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✅\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eISO Metric Thread Standard\u003c\/strong\u003e — Dimensionally consistent with M-series tapped holes, nuts, and threaded inserts; no compatibility guesswork for standard metric applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e📐 Technical Specifications — A2 Stainless Pan Head Security Torx Machine Screws M2–M4\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\u003eA2 Stainless Steel (304 \/ 18-8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural stainless (no coating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eISO Metric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Diameters\u003c\/th\u003e\n\u003ctd\u003eM2, M2.5, M3, M4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003ePan Head (Round Head)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Type\u003c\/th\u003e\n\u003ctd\u003eSecurity Torx (TR \/ pin-in Torx) — TR6 (M2) \/ TR8 (M2.5) \/ TR10 (M3) \/ TR15 (M4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003ctd\u003e4mm (0.16”), 5mm (0.20”), 6mm (0.24”), 8mm (0.31”), 10mm (0.39”), 12mm (0.47”), 16mm (0.63”), 20mm (0.79”) — varies by diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Size\u003c\/th\u003e\n\u003ctd\u003e20 pcs (all sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScrew Type\u003c\/th\u003e\n\u003ctd\u003eMachine screw (requires tapped hole or nut)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLength Measurement\u003c\/th\u003e\n\u003ctd\u003eExcluding head (shaft length only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCorrosion Resistance\u003c\/th\u003e\n\u003ctd\u003eExcellent — suitable for indoor and light outdoor use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCommon Applications\u003c\/th\u003e\n\u003ctd\u003eElectronics enclosures, public fixtures, display hardware, anti-theft installations, kiosks, and access panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is a Security Torx screw?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA Security Torx screw (also called Torx TR, Tamper-Resistant Torx, or pin-in Torx) has a standard 6-point star drive with a center pin that prevents standard Torx drivers from engaging. A matching Security Torx (TR) driver with a center hole is required to drive or remove these screws. This makes them a practical deterrent against unauthorized removal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat driver do I need for Security Torx screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA Security Torx (TR) driver with a center hole is required. Standard Torx (T) drivers will not fit due to the center pin. Driver sizes: M2 = TR6, M2.5 = TR8, M3 = TR10, M4 = TR15. Always verify the correct TR size for your specific screw before purchasing a driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat does A2 stainless steel mean?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA2 is the most common grade of austenitic stainless steel, equivalent to 304 or 18-8 stainless. It offers excellent corrosion resistance, is non-magnetic in most conditions, and is the standard material for general-purpose stainless fasteners in electronics, fixtures, and light outdoor use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these screws rust-proof?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA2 stainless steel provides strong corrosion resistance and will not rust under normal indoor conditions or light outdoor exposure. For marine, coastal, or highly corrosive environments, A4 (316) stainless is generally recommended. These screws are well-suited for electronics, public fixtures, and sheltered outdoor installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\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\u003eMeasure the depth of the tapped hole or the thickness of the material being fastened. The screw length (excluding head) should engage at least 1.5× the thread diameter for a secure hold. Available lengths: 4mm (0.16”) to 20mm (0.79”) depending on the diameter. When in doubt, size up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo these require a tapped hole or nut?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes — these are machine screws, not self-tapping. They require a pre-tapped M-series hole or a matching metric nut in the same thread size. They will not cut their own thread into plastic or metal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are A2 stainless Security Torx screws?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA2 stainless steel typically has a tensile strength of around 500–700 MPa, suitable for light-to-medium clamping loads in electronics, panels, and fixtures. For critical load-bearing applications, verify the specific grade and consult torque specifications for the thread size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow many screws are in each pack?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eEach pack contains 20 pieces. All 24 size combinations are sold in packs of 20. Select your preferred thread diameter and length using the Size option above.\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\u003c\/strong\u003e above, then add to cart — ships from our US warehouse.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M2*4 mm \/ 20","offer_id":52253571383570,"sku":"GH03326x20","price":3.37,"currency_code":"USD","in_stock":true},{"title":"M2*5 mm \/ 20","offer_id":52253571416338,"sku":"GH03327x20","price":4.96,"currency_code":"USD","in_stock":true},{"title":"M2*6 mm \/ 20","offer_id":52253571449106,"sku":"GH03328x20","price":5.14,"currency_code":"USD","in_stock":true},{"title":"M2*8 mm \/ 20","offer_id":52253571481874,"sku":"GH03329x20","price":5.3,"currency_code":"USD","in_stock":true},{"title":"M2*10 mm \/ 20","offer_id":52253571514642,"sku":"GH03330x20","price":5.48,"currency_code":"USD","in_stock":true},{"title":"M2.5*4 mm \/ 20","offer_id":52253571547410,"sku":"GH03331x20","price":4.96,"currency_code":"USD","in_stock":true},{"title":"M2.5*5 mm \/ 20","offer_id":52253571580178,"sku":"GH03332x20","price":5.14,"currency_code":"USD","in_stock":true},{"title":"M2.5*6 mm \/ 20","offer_id":52253571612946,"sku":"GH03333x20","price":5.3,"currency_code":"USD","in_stock":true},{"title":"M2.5*8 mm \/ 20","offer_id":52253571645714,"sku":"GH03334x20","price":5.48,"currency_code":"USD","in_stock":true},{"title":"M2.5*10 mm \/ 20","offer_id":52253571678482,"sku":"GH03335x20","price":5.64,"currency_code":"USD","in_stock":true},{"title":"M2.5*12 mm \/ 20","offer_id":52253571711250,"sku":"GH03336x20","price":5.98,"currency_code":"USD","in_stock":true},{"title":"M3*4 mm \/ 20","offer_id":52253571744018,"sku":"GH03337x20","price":4.96,"currency_code":"USD","in_stock":true},{"title":"M3*5 mm \/ 20","offer_id":52253571776786,"sku":"GH03338x20","price":5.14,"currency_code":"USD","in_stock":true},{"title":"M3*6 mm \/ 20","offer_id":52253571809554,"sku":"GH03339x20","price":5.3,"currency_code":"USD","in_stock":true},{"title":"M3*8 mm \/ 20","offer_id":52253571842322,"sku":"GH03340x20","price":5.48,"currency_code":"USD","in_stock":true},{"title":"M3*10 mm \/ 20","offer_id":52253571875090,"sku":"GH03341x20","price":5.64,"currency_code":"USD","in_stock":true},{"title":"M3*12 mm \/ 20","offer_id":52253571907858,"sku":"GH03342x20","price":5.98,"currency_code":"USD","in_stock":true},{"title":"M3*16 mm \/ 20","offer_id":52253571940626,"sku":"GH03343x20","price":6.6,"currency_code":"USD","in_stock":true},{"title":"M4*6 mm \/ 20","offer_id":52253571973394,"sku":"GH03344x20","price":5.98,"currency_code":"USD","in_stock":true},{"title":"M4*8 mm \/ 20","offer_id":52253572006162,"sku":"GH03345x20","price":6.19,"currency_code":"USD","in_stock":true},{"title":"M4*10 mm \/ 20","offer_id":52253572038930,"sku":"GH03346x20","price":6.77,"currency_code":"USD","in_stock":true},{"title":"M4*12 mm \/ 20","offer_id":52253572071698,"sku":"GH03347x20","price":8.47,"currency_code":"USD","in_stock":true},{"title":"M4*16 mm \/ 20","offer_id":52253572104466,"sku":"GH03348x20","price":9.49,"currency_code":"USD","in_stock":true},{"title":"M4*20 mm \/ 20","offer_id":52253572137234,"sku":"GH03349x20","price":10.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/A2304StainlessSteel-TorxPanHeadSecurityMachineScrewsM2M2.5M3M4-Picture1of1_4fb3269b-5e7d-4c34-ad56-2b8092a05820.jpg?v=1778919157","url":"https:\/\/homediyer.com\/products\/a2-304-stainless-pan-head-security-torx-machine-screws-m2-m4-tamper-resistant","provider":"HomeDIYer","version":"1.0","type":"link"}