{"title":"Flat Square Nuts (DIN 562) - Marine Stainless Steel (A4)","description":"\u003ch1\u003eFlat Square Nuts (DIN 562) – Marine Stainless Steel A4 (SUS316)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 562 thin pattern square nuts in marine-grade stainless steel A4 (SUS316) offer superior corrosion resistance compared to standard A2 grade, making them the preferred choice for marine, offshore, chemical, and harsh outdoor environments. The four-sided geometry provides a larger bearing surface than hexagonal nuts, enabling higher clamping torque and superior resistance to loosening. The reduced thickness compared to DIN 557 counterparts makes them ideal for space-constrained assemblies. All products are pickled and passivated for maximum surface protection.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eStandard\u003c\/th\u003e\n      \u003cth\u003eType\u003c\/th\u003e\n      \u003cth\u003eMaterial\u003c\/th\u003e\n      \u003cth\u003eGrade\u003c\/th\u003e\n      \u003cth\u003eSurface Treatment\u003c\/th\u003e\n      \u003cth\u003eThread\u003c\/th\u003e\n      \u003cth\u003eRoHS\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eDIN 562\u003c\/td\u003e\n      \u003ctd\u003eThin Square Nut (Flat Pattern)\u003c\/td\u003e\n      \u003ctd\u003eStainless Steel\u003c\/td\u003e\n      \u003ctd\u003eA4 \/ SUS316\u003c\/td\u003e\n      \u003ctd\u003ePickled \u0026amp; Passivated\u003c\/td\u003e\n      \u003ctd\u003eMetric (M2–M10)\u003c\/td\u003e\n      \u003ctd\u003eCompliant\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDimensional Data\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Weight per 1000 pcs in kg. Unit weight (g\/pc) calculated from standard data.\u003c\/p\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eThread (D)\u003c\/th\u003e\n      \u003cth\u003eWidth Across Flats (S) mm\u003c\/th\u003e\n      \u003cth\u003eWidth Across Corners (E) mm\u003c\/th\u003e\n      \u003cth\u003eThickness (M) mm\u003c\/th\u003e\n      \u003cth\u003eWeight \/ 1000 pcs (kg)\u003c\/th\u003e\n      \u003cth\u003eUnit Weight (g\/pc)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e5.2\u003c\/td\u003e\n\u003ctd\u003e1.2\u003c\/td\u003e\n\u003ctd\u003e0.13\u003c\/td\u003e\n\u003ctd\u003e0.13\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e6.3\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e0.27\u003c\/td\u003e\n\u003ctd\u003e0.27\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e5.5\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e1.8\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e8.9\u003c\/td\u003e\n\u003ctd\u003e2.2\u003c\/td\u003e\n\u003ctd\u003e0.64\u003c\/td\u003e\n\u003ctd\u003e0.64\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e10.2\u003c\/td\u003e\n\u003ctd\u003e2.7\u003c\/td\u003e\n\u003ctd\u003e1.06\u003c\/td\u003e\n\u003ctd\u003e1.06\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e12.7\u003c\/td\u003e\n\u003ctd\u003e3.2\u003c\/td\u003e\n\u003ctd\u003e1.93\u003c\/td\u003e\n\u003ctd\u003e1.93\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e16.5\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e4.01\u003c\/td\u003e\n\u003ctd\u003e4.01\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e17\u003c\/td\u003e\n\u003ctd\u003e21.6\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e8.80\u003c\/td\u003e\n\u003ctd\u003e8.80\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eNote: A4 (SUS316) density is approximately 8% higher than A2 (SUS304). Weights above are based on DIN 562 standard reference data; actual weights may vary slightly by batch.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eA4 vs A2 – Why Choose Marine Grade?\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:center;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eA2 \/ SUS304\u003c\/th\u003e\n      \u003cth\u003eA4 \/ SUS316\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChromium Content\u003c\/td\u003e\n\u003ctd\u003e18%\u003c\/td\u003e\n\u003ctd\u003e16–18%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMolybdenum Content\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e2–3%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChloride Resistance\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMarine \/ Saltwater Use\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003ctd\u003e✅ Recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChemical Resistance\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003ctd\u003eSuperior\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePitting Corrosion Resistance\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eEnhanced (Mo addition)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSelection Guide\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse;width:100%;text-align:left;\"\u003e\n  \u003cthead style=\"background-color:#f2f2f2;\"\u003e\n    \u003ctr\u003e\n      \u003cth\u003eApplication Scenario\u003c\/th\u003e\n      \u003cth\u003eRecommended Size\u003c\/th\u003e\n      \u003cth\u003eReason\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eMarine \u0026amp; offshore structures\u003c\/td\u003e\n      \u003ctd\u003eM5 – M10\u003c\/td\u003e\n      \u003ctd\u003eA4 SUS316 resists saltwater chloride attack\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eChemical processing equipment\u003c\/td\u003e\n      \u003ctd\u003eM4 – M10\u003c\/td\u003e\n      \u003ctd\u003eMolybdenum addition enhances acid resistance\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCoastal outdoor installations\u003c\/td\u003e\n      \u003ctd\u003eM4 – M8\u003c\/td\u003e\n      \u003ctd\u003eSuperior pitting resistance in humid salt air\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFood \u0026amp; pharmaceutical machinery\u003c\/td\u003e\n      \u003ctd\u003eM3 – M8\u003c\/td\u003e\n      \u003ctd\u003eSUS316 meets hygienic material standards\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePCB \/ electronics in harsh environments\u003c\/td\u003e\n      \u003ctd\u003eM2 – M3\u003c\/td\u003e\n      \u003ctd\u003eNon-magnetic, compact, corrosion-resistant\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSwimming pool \u0026amp; water treatment\u003c\/td\u003e\n      \u003ctd\u003eM5 – M10\u003c\/td\u003e\n      \u003ctd\u003eChlorinated water resistance superior to A2\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eStandard Reference\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDIN 562\u003c\/strong\u003e specifies thin pattern square nuts with metric threads, issued by the Deutsches Institut für Normung (DIN). The standard remains widely used in Germany, Europe, and globally for applications where no direct ISO equivalent exists or where legacy compatibility is required. FULLERKREG manufactures these nuts in A4 \/ SUS316 marine stainless steel with strict conformance to DIN 562 dimensional tolerances, pickled and passivated to maximize corrosion protection.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eDIN 562 A4 Marine Stainless Steel Thin Square Nuts – actual product photos\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable border=\"0\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%;text-align:center;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;\"\u003e[Photo 1]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;\"\u003e[Photo 2]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;\"\u003e[Photo 3]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;\"\u003e[Photo 4]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003cp\u003e\n🏭 \u003cstrong\u003eDirect Manufacturer\u003c\/strong\u003e – Factory-direct pricing with full dimensional traceability\u003cbr\u003e\n📐 \u003cstrong\u003eDIN Precision\u003c\/strong\u003e – Strict conformance to DIN 562 tolerances, verified by incoming QC\u003cbr\u003e\n🌊 \u003cstrong\u003eTrue Marine Grade A4\u003c\/strong\u003e – SUS316 with molybdenum for superior chloride and saltwater resistance\u003cbr\u003e\n✅ \u003cstrong\u003eRoHS Compliant\u003c\/strong\u003e – All products meet EU RoHS environmental directives\u003cbr\u003e\n📦 \u003cstrong\u003eBulk Wholesale Ready\u003c\/strong\u003e – MOQ flexible, available in reels, bags, or bulk cartons\u003cbr\u003e\n🌍 \u003cstrong\u003eGlobal Shipping\u003c\/strong\u003e – Reliable export logistics to Europe, North America, Southeast Asia\u003cbr\u003e\n💬 \u003cstrong\u003eTechnical Support\u003c\/strong\u003e – Engineering team available for specification and substitution queries\n\u003c\/p\u003e","products":[{"product_id":"din-562-a4-m10","title":"M10-1.5 Flat Square Nuts (DIN 562) - Marine Stainless Steel (A4)-3300 Pcs per Carton","description":"\u003cp\u003e20\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519153467503,"sku":"DIN 562-A4-M10","price":267.3,"currency_code":"USD","in_stock":true}]},{"product_id":"din-562-a4-m6","title":"M6-1.0 Flat Square Nuts (DIN 562) - Marine Stainless Steel (A4)-16200 Pcs per Carton","description":"\u003cp\u003e21\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519153500271,"sku":"DIN 562-A4-M6","price":291.6,"currency_code":"USD","in_stock":true}]},{"product_id":"din-562-a4-m8","title":"M8-1.25 Flat Square Nuts (DIN 562) - Marine Stainless Steel (A4)-7800 Pcs per Carton","description":"\u003cp\u003e22\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44519153533039,"sku":"DIN 562-A4-M8","price":280.8,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/collections\/DIN_562_5709ec04-3749-4dc1-9fe6-99626f529521.webp?v=1770608422","url":"https:\/\/www.fullerkr.com\/collections\/din562-a4.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}