{"product_id":"304-stainless-steel-metric-screw-assortment-kit-button-head-cap-screws-nuts-washers","title":"304 Stainless Steel Metric Screw Assortment Kit – Button Head Cap Screws, Nuts \u0026 Flat Washers","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003e304 Stainless Steel Metric Screw Assortment Kit — One Box, Every Size You Need\u003c\/h2\u003e\n    \u003cp\u003eMid-project hardware runs are frustrating. Whether you're tightening a motorcycle bracket, assembling furniture, or wiring a control panel, stopping because you're one M4 bolt short kills momentum. This metric screw assortment kit puts M3, M4, and M5 button head cap screws, flat washers, and hex nuts in a single organized box — so the right fastener is always within reach.\u003c\/p\u003e\n    \u003cp\u003eThe kit is built from 304 stainless steel with a passivated silver finish. Screws range from 8 mm to 20 mm in length (approx. 5\/16 in – 25\/32 in), covering the most common metric thread sizes used in light machinery, electronics, and general repair. Each piece is sorted into a 24-compartment transparent storage case for fast identification and clean storage.\u003c\/p\u003e\n    \u003cp\u003eAvailable in three assortment sizes — 840 pcs (M3\/M4\/M5), 1300 pcs (M2\/M3\/M4\/M5), and 1410 pcs (M3 only) — so you can match the kit to your workload, whether it's a weekend project or a busy workshop bench.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e✅\u003c\/span\u003e Compatible with standard metric hex key (Allen wrench) sets — M3, M4, and M5 socket sizes. Suitable for indoor and outdoor use in humid or high-temperature environments.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKey Features\u003c\/h2\u003e\n  \u003cul class=\"hdiy-features\"\u003e\n    \u003cli\u003e\u003cspan\u003e🔩 \u003cstrong\u003eButton Head Hex Socket Drive\u003c\/strong\u003e — Low-profile rounded head with internal hex socket provides a clean, snag-free finish and secure torque transfer with a standard Allen key.\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan\u003e🛡️ \u003cstrong\u003e304 Stainless Steel with Passivated Surface\u003c\/strong\u003e — Corrosion-resistant alloy with passivation treatment for reinforced rust resistance; suitable for humid, outdoor, and high-temperature environments.\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan\u003e📐 \u003cstrong\u003eMultiple Lengths per Thread Size\u003c\/strong\u003e — M3, M4, and M5 screws available in 8 mm, 12 mm, 16 mm, and 20 mm lengths (approx. 5\/16 in – 25\/32 in), covering the most common metric fastener needs in one kit.\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan\u003e🔧 \u003cstrong\u003eComplete 3-Piece Fastener System\u003c\/strong\u003e — Each kit includes matching button head cap screws, flat washers, and hex nuts, giving you a full fastening solution without sourcing parts separately.\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan\u003e📦 \u003cstrong\u003e24-Compartment Organized Storage Case\u003c\/strong\u003e — Transparent plastic case with labeled compartments keeps every size separated and instantly visible — no more digging through mixed bags.\u003c\/span\u003e\u003c\/li\u003e\n    \u003cli\u003e\u003cspan\u003e⚙️ \u003cstrong\u003eThree Kit Sizes to Match Your Needs\u003c\/strong\u003e — Choose 840 pcs (M3–M5), 1300 pcs (M2–M5), or 1410 pcs (M3 focus) depending on your project scale and thread size requirements.\u003c\/span\u003e\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cp\u003e\u003cstrong\u003e840 Pcs Kit (M3\/M4\/M5 — 304 Stainless Steel):\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul class=\"hdiy-list\"\u003e\n    \u003cli\u003eM5×8mm ×15, M5×12mm ×15, M5×16mm ×10, M5×20mm ×10\u003c\/li\u003e\n    \u003cli\u003eM4×8mm ×30, M4×12mm ×20, M4×16mm ×20, M4×20mm ×20\u003c\/li\u003e\n    \u003cli\u003eM3×8mm ×40, M3×12mm ×30, M3×16mm ×30, M3×20mm ×30\u003c\/li\u003e\n    \u003cli\u003eWasher M5 ×60, Washer M4 ×100, Washer M3 ×140\u003c\/li\u003e\n    \u003cli\u003eNut M5 ×60, Nut M4 ×90, Nut M3 ×130\u003c\/li\u003e\n    \u003cli\u003e1× 24-compartment transparent storage case\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003e1300 Pcs and 1410 Pcs kits include additional M2 and\/or M3 sizes — see variant options for details.\u003c\/em\u003e\u003c\/p\u003e\n\n  \u003ch2\u003eWho Is This For\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-usecases\"\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cstrong\u003e🔧 DIY Enthusiasts \u0026amp; Home Repair\u003c\/strong\u003e\n      \u003cp\u003eKeep a full metric fastener set on hand for furniture assembly, appliance repairs, and home improvement projects without multiple hardware store trips.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cstrong\u003e🏍️ Automotive \u0026amp; Motorcycle Mechanics\u003c\/strong\u003e\n      \u003cp\u003eIdeal for bracket fastening, panel mounting, and general mechanical repairs where M3–M5 metric bolts are standard.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cstrong\u003e⚙️ Industrial Machinery \u0026amp; Precision Electronics\u003c\/strong\u003e\n      \u003cp\u003eButton head profile and stainless construction suit control panels, instrument enclosures, and light industrial equipment where a low-profile, corrosion-resistant fastener is required.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"hdiy-usecase-item\"\u003e\n      \u003cstrong\u003e🪑 Furniture Makers \u0026amp; Woodworkers\u003c\/strong\u003e\n      \u003cp\u003eFlat washers and hex nuts pair with the button head screws for clean, flush connections in wood and composite furniture builds.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003ePassivated Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eHead Style\u003c\/td\u003e\n\u003ctd\u003eButton Head (Low Profile Round)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eDrive Style\u003c\/td\u003e\n\u003ctd\u003eHex Socket (Allen \/ Internal Hex)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eThread Sizes\u003c\/td\u003e\n\u003ctd\u003eM2, M3, M4, M5 (varies by kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eScrew Lengths\u003c\/td\u003e\n\u003ctd\u003e8 mm, 12 mm, 16 mm, 20 mm (approx. 5\/16 in – 25\/32 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eIncluded Hardware\u003c\/td\u003e\n\u003ctd\u003eButton Head Cap Screws, Flat Washers, Hex Nuts\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eKit Sizes Available\u003c\/td\u003e\n\u003ctd\u003e840 Pcs \/ 1300 Pcs \/ 1410 Pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003e24-Compartment Transparent Plastic Case\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eThread Standard\u003c\/td\u003e\n\u003ctd\u003eMetric (ISO)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\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\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat thread standard do these screws use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eThese screws follow the ISO metric thread standard. They are compatible with standard metric nuts and threaded inserts in M2, M3, M4, and M5 sizes depending on the kit selected.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat Allen key size do I need to drive these screws?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eYou will need a standard metric hex key (Allen wrench) set. M3 screws typically use a 2.5 mm hex key, M4 uses 3 mm, and M5 uses 4 mm. Most standard metric Allen key sets include all three sizes.\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\"\u003eYes. The 304 stainless steel construction with passivated surface treatment provides strong corrosion resistance, making these screws suitable for humid, outdoor, and moderately high-temperature environments.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the 840 Pcs, 1300 Pcs, and 1410 Pcs kits?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eThe 840 Pcs kit covers M3, M4, and M5 sizes. The 1300 Pcs kit adds M2 sizes and includes a larger total count across M2–M5. The 1410 Pcs kit focuses on M3 with a higher quantity of that size. Choose based on the thread sizes and volume your projects typically require.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these screws with a power drill or screwdriver?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eYes, with a compatible hex bit attachment. These button head cap screws use an internal hex socket drive, so a hex bit (Allen bit) of the correct size for your drill or screwdriver will work. Hand tightening with an Allen key is also recommended for final torque control.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eAre the flat washers and hex nuts in the kit the same material as the screws?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eYes. The flat washers and hex nuts included in the kit are also made from 304 stainless steel, ensuring consistent corrosion resistance and material compatibility across the full fastener assembly.\u003c\/div\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n      \u003csummary\u003eIs the storage case included with every kit?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003eYes. Every kit variant includes a 24-compartment transparent plastic storage case with labeled sections for each size, keeping your fasteners organized and easy to identify.\u003c\/div\u003e\n    \u003c\/details\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    \u003cstrong\u003eStop searching for the right screw mid-project.\u003c\/strong\u003e Add this 304 stainless steel metric screw assortment kit to your toolbox and have every M3, M4, and M5 fastener you need — organized, rust-resistant, and ready to go.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"HomeDIYer","offers":[{"title":"M3 M4 M5 \/ 304 Stainless Steel \/ 840Pcs","offer_id":51056224698642,"sku":"GBTST0029","price":35.99,"currency_code":"USD","in_stock":true},{"title":"M3 \/ 304 Stainless Steel \/ 1410Pcs","offer_id":51056224731410,"sku":"GBTST0030","price":22.99,"currency_code":"USD","in_stock":true},{"title":"M2 M3 M4 M5 \/ 304 Stainless Steel \/ 1300Pcs","offer_id":51056224764178,"sku":"GBTST0032","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/MetricSilver840-01.jpg?v=1762199619","url":"https:\/\/homediyer.com\/products\/304-stainless-steel-metric-screw-assortment-kit-button-head-cap-screws-nuts-washers","provider":"HomeDIYer","version":"1.0","type":"link"}