{"product_id":"m3-5-m6-3-phillips-countersunk-head-self-drilling-screws-410-stainless-steel-50-piece","title":"M3.5–M6.3 Phillips Countersunk Head Self-Drilling Screws 410 Stainless Steel – 50-Piece Pack","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eM3.5–M6.3 Phillips Countersunk Head Self-Drilling Screws — 410 Stainless Steel, Six Diameters, 50-Piece Packs\u003c\/h2\u003e\n    \u003cp\u003eWhen a project demands a flush, snag-free finish — whether you’re fastening wood panels, securing metal components, or assembling equipment — a countersunk head screw is the right choice. This range covers six thread diameters from M3.5 to M6.3, each available in multiple lengths, so you can match the exact fastener to your application.\u003c\/p\u003e\n    \u003cp\u003eEvery screw is machined from 410 stainless steel, a high-hardness martensitic alloy that outperforms standard stainless in torque resistance and corrosion resistance. The Phillips drive is compatible with any standard power drill, and the self-drilling tip eliminates the need for a pilot hole in most applications. Each size is sold in a 50-piece pack for consistent, project-ready quantities.\u003c\/p\u003e\n    \u003cp\u003eFrom furniture assembly and equipment repair to metal panel fastening and heavy-duty DIY fabrication, these countersunk self-drilling screws deliver a clean, flush hold that holds up in both indoor and outdoor environments.\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    Compatible with wood, sheet metal, aluminum, and general DIY substrates — suitable for furniture, equipment, and light fabrication applications indoors and outdoors\n  \u003c\/div\u003e\n\n  \u003cdiv\u003e\n    \u003ch2\u003e✅ Key Features of These M3.5–M6.3 Phillips Countersunk Self-Drilling Screws\u003c\/h2\u003e\n    \u003cul class=\"hdiy-features\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eSelf-Drilling — No Pilot Hole Required:\u003c\/strong\u003e Sharp drill-point tip bores directly into wood and light-gauge metal without pre-drilling, reducing installation steps and tool changes on site.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003e410 Stainless Steel:\u003c\/strong\u003e High-hardness martensitic alloy with greater torque resistance and corrosion resistance than standard 304 stainless — holds up in high-humidity, outdoor, and temperature-variable environments.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eCountersunk Head — Flush Finish:\u003c\/strong\u003e Flat countersunk head sits flush with or below the surface material, eliminating snag points and providing a clean, professional finish on visible surfaces.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eSix Diameters, Multiple Lengths:\u003c\/strong\u003e M3.5, M3.9, M4.2, M4.8, M5.5, and M6.3 — each available in lengths from 13 mm up to 75 mm, covering the full range of light-to-medium gauge fastening tasks.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🗂️\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003e50-Piece Packs:\u003c\/strong\u003e Each size combination is sold in a consistent 50-piece quantity — enough for most project runs without overstocking, and easy to reorder when you need more.\u003c\/span\u003e\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🏗️\u003c\/span\u003e\n        \u003cspan\u003e\u003cstrong\u003eBroad Application Range:\u003c\/strong\u003e Suitable for wood furniture assembly, metal panel fastening, equipment repair, electronic enclosures, and general heavy-duty DIY fabrication in home, office, and industrial settings.\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📦 What's in the Box\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Diameter\u003c\/th\u003e\n\u003cth\u003eAvailable Lengths\u003c\/th\u003e\n\u003cth\u003ePack Size\u003c\/th\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM3.5\u003c\/td\u003e\n\u003ctd\u003e13 \/ 16 \/ 19 \/ 25 \/ 32 \/ 38 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM3.9\u003c\/td\u003e\n\u003ctd\u003e13 \/ 16 \/ 19 \/ 25 \/ 32 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM4.2\u003c\/td\u003e\n\u003ctd\u003e13 \/ 16 \/ 19 \/ 25 \/ 32 \/ 38 \/ 50 \/ 60 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM4.8\u003c\/td\u003e\n\u003ctd\u003e13 \/ 16 \/ 19 \/ 25 \/ 32 \/ 38 \/ 50 \/ 63 \/ 75 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM5.5\u003c\/td\u003e\n\u003ctd\u003e19 \/ 25 \/ 32 \/ 38 \/ 50 \/ 63 \/ 75 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eM6.3\u003c\/td\u003e\n\u003ctd\u003e19 \/ 25 \/ 32 \/ 38 \/ 50 mm\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-usecases\"\u003e\n    \u003ch2\u003e🎯 Who Is This For?\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🏠\u003c\/span\u003e\n      \u003cstrong\u003eHome DIYers \u0026amp; Furniture Builders\u003c\/strong\u003e\n      \u003cp\u003eAssemble wood furniture, secure shelving, and fasten panels with a flush countersunk finish that leaves surfaces smooth and snag-free — no visible screw head above the surface.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🔧\u003c\/span\u003e\n      \u003cstrong\u003eContractors \u0026amp; Equipment Repair Technicians\u003c\/strong\u003e\n      \u003cp\u003eSelect the exact diameter and length for each job from six thread sizes and up to nine lengths per diameter — without carrying multiple product lines on site.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cspan\u003e🏭\u003c\/span\u003e\n      \u003cstrong\u003eMetal Fabricators \u0026amp; Industrial Maintenance\u003c\/strong\u003e\n      \u003cp\u003eFasten metal panels, secure enclosures, and perform mechanical maintenance with corrosion-resistant 410 stainless steel fasteners that hold up in demanding environments.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Diameters\u003c\/th\u003e\n\u003ctd\u003eM3.5 \/ M3.9 \/ M4.2 \/ M4.8 \/ M5.5 \/ M6.3\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLength Range\u003c\/th\u003e\n\u003ctd\u003e13 mm – 75 mm (varies by diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eHead Style\u003c\/th\u003e\n\u003ctd\u003eCountersunk (Flat) Head\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDrive Style\u003c\/th\u003e\n\u003ctd\u003ePhillips\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePoint Type\u003c\/th\u003e\n\u003ctd\u003eSelf-Drilling (TEK)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eThread Type\u003c\/th\u003e\n\u003ctd\u003eCoarse, Full Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e410 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eNatural Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePack Size\u003c\/th\u003e\n\u003ctd\u003e50 pieces per size combination\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eWood, sheet metal, aluminum, DIY \u0026amp; industrial — indoor \u0026amp; outdoor\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    \u003cdetails\u003e\n      \u003csummary\u003eDo these screws require a pilot hole?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo. The self-drilling tip is designed to bore through wood and light-gauge metal without a pre-drilled pilot hole in most applications. For harder metals or thicker gauges, a small pilot hole may improve installation quality.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the six thread diameters?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe thread diameter determines the screw’s holding strength and the size of the hole it creates. Smaller diameters (M3.5, M3.9) are suited for lighter-gauge materials and tighter clearances. Larger diameters (M5.5, M6.3) provide greater holding strength in denser or thicker substrates. Select the diameter based on your material thickness and load requirements.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhy is 410 stainless steel used instead of standard stainless?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e410 stainless steel is a martensitic alloy with higher hardness and torque resistance than the more common 304 stainless steel. This makes it better suited for self-drilling applications where the screw must cut its own thread without deforming. It also offers good corrosion resistance in most environments.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does \"countersunk head\" mean and why does it matter?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA countersunk (flat) head is designed to sit flush with or below the surface of the material when fully driven. This eliminates any protrusion above the surface, reducing snag points and providing a clean, professional finish — particularly important for visible surfaces, furniture, and applications where a raised head would interfere with other components.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these screws suitable for outdoor use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. 410 stainless steel provides good corrosion and rust resistance for outdoor applications in typical environments including high-humidity and temperature-variable conditions. For highly corrosive marine or coastal environments, 316 stainless steel is generally recommended for long-term exposure.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat screwdriver or bit do I need?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA standard Phillips #2 bit fits most sizes in this range. For larger diameters (M5.5, M6.3), a Phillips #3 bit may be required. A power drill or cordless screwdriver set to moderate torque is recommended to avoid stripping the head.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right length?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAs a general guideline, the screw length should be approximately 2–3 times the thickness of the material being fastened. For example, fastening a 6 mm panel typically calls for a 13–19 mm screw. Contact us if you need help selecting the right size for your specific application.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your thread diameter and length above, then add to cart.\u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3.5 \/ 13mm","offer_id":50767166144786,"sku":"BRTQJD005487x50","price":2.85,"currency_code":"USD","in_stock":true},{"title":"M3.5 \/ 16mm","offer_id":50767166177554,"sku":"BRTQJD005488x50","price":3.28,"currency_code":"USD","in_stock":true},{"title":"M3.5 \/ 19mm","offer_id":50767166210322,"sku":"BRTQJD005489x50","price":3.66,"currency_code":"USD","in_stock":true},{"title":"M3.5 \/ 25mm","offer_id":50767166243090,"sku":"BRTQJD005490x50","price":4.38,"currency_code":"USD","in_stock":true},{"title":"M3.5 \/ 32mm","offer_id":50767166275858,"sku":"BRTQJD005491x50","price":5.25,"currency_code":"USD","in_stock":true},{"title":"M3.5 \/ 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13mm","offer_id":50767166767378,"sku":"BRTQJD005506x50","price":4.13,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 16mm","offer_id":50767166800146,"sku":"BRTQJD005507x50","price":4.81,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 19mm","offer_id":50767166832914,"sku":"BRTQJD005508x50","price":5.48,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 25mm","offer_id":50767166865682,"sku":"BRTQJD005509x50","price":6.9,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 32mm","offer_id":50767166898450,"sku":"BRTQJD005510x50","price":8.58,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 38mm","offer_id":50767166931218,"sku":"BRTQJD005511x50","price":10.01,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 50mm","offer_id":50767166963986,"sku":"BRTQJD005512x50","price":12.86,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 63mm","offer_id":50767167029522,"sku":"BRTQJD005513x50","price":16.0,"currency_code":"USD","in_stock":true},{"title":"M4.8 \/ 75mm","offer_id":50767167062290,"sku":"BRTQJD005514x50","price":19.57,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 19mm","offer_id":50767167095058,"sku":"BRTQJD005515x50","price":7.29,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 25mm","offer_id":50767167127826,"sku":"BRTQJD005516x50","price":9.15,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 32mm","offer_id":50767167160594,"sku":"BRTQJD005517x50","price":11.3,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 38mm","offer_id":50767167193362,"sku":"BRTQJD005518x50","price":13.18,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 50mm","offer_id":50767167226130,"sku":"BRTQJD005519x50","price":16.88,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 63mm","offer_id":50767167258898,"sku":"BRTQJD005520x50","price":21.19,"currency_code":"USD","in_stock":true},{"title":"M5.5 \/ 75mm","offer_id":50767167291666,"sku":"BRTQJD005521x50","price":25.1,"currency_code":"USD","in_stock":true},{"title":"M6.3 \/ 19mm","offer_id":50767167324434,"sku":"BRTQJD005522x50","price":9.98,"currency_code":"USD","in_stock":true},{"title":"M6.3 \/ 25mm","offer_id":50767167357202,"sku":"BRTQJD005523x50","price":12.48,"currency_code":"USD","in_stock":true},{"title":"M6.3 \/ 32mm","offer_id":50767167389970,"sku":"BRTQJD005524x50","price":15.24,"currency_code":"USD","in_stock":true},{"title":"M6.3 \/ 38mm","offer_id":50767167422738,"sku":"BRTQJD005525x50","price":17.75,"currency_code":"USD","in_stock":true},{"title":"M6.3 \/ 50mm","offer_id":50767167455506,"sku":"BRTQJD005526x50","price":22.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/410StainlessSteelPhillipsCountersunkheadDrillingscrews_1_e6dce0a9-f5aa-40c3-a788-6f61be3f6f0a.jpg?v=1762198952","url":"https:\/\/homediyer.com\/products\/m3-5-m6-3-phillips-countersunk-head-self-drilling-screws-410-stainless-steel-50-piece","provider":"HomeDIYer","version":"1.0","type":"link"}