{"title":"Chamfered Square Nuts (DIN 557) - Marine Stainless Steel (A4)","description":"\u003ch1\u003eChamfered Square Nuts (DIN 557) — Marine Stainless Steel A4 (SUS316)\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 557 chamfered square nuts in A4 marine-grade stainless steel (SUS316 \/ AISI 316) deliver superior resistance to chloride-induced corrosion, making them the preferred choice for offshore, marine, coastal, chemical, and food-processing environments. The chamfered top face ensures clean seating and simplified assembly. Manufactured to DIN 557 geometry with pickled and passivated surface finish for maximum corrosion 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\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eDetails\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eDIN 557\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eChamfered Square Nut\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eMarine Stainless Steel SUS316 (A4)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003ePickled \u0026amp; Passivated (Bright Finish)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThread Type\u003c\/td\u003e\n\u003ctd\u003eMetric Coarse Thread (ISO 68-1)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003eM5 – M16\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS Compliant\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMagnetic Properties\u003c\/td\u003e\n\u003ctd\u003eNon-magnetic (austenitic; minimal cold-work effect vs. A2)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDimensional Data (DIN 557 · Unit: mm)\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 rowspan=\"2\"\u003eThread Size\u003cbr\u003ed\u003c\/th\u003e\n      \u003cth rowspan=\"2\"\u003ePitch\u003cbr\u003e(mm)\u003c\/th\u003e\n      \u003cth colspan=\"2\"\u003eNut Height m (mm)\u003c\/th\u003e\n      \u003cth rowspan=\"2\"\u003eMin Wrenching\u003cbr\u003emw (mm)\u003c\/th\u003e\n      \u003cth colspan=\"2\"\u003eAcross Flats s (mm)\u003c\/th\u003e\n      \u003cth colspan=\"2\"\u003eAcross Corners e (mm)\u003c\/th\u003e\n      \u003cth rowspan=\"2\"\u003eBearing Dia.\u003cbr\u003edw min (mm)\u003c\/th\u003e\n      \u003cth rowspan=\"2\"\u003eEst. Unit Weight\u003cbr\u003e(g\/pc)\u003c\/th\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003cth\u003emax\u003c\/th\u003e\n      \u003cth\u003emin\u003c\/th\u003e\n      \u003cth\u003emax\u003c\/th\u003e\n      \u003cth\u003emin\u003c\/th\u003e\n      \u003cth\u003emax\u003c\/th\u003e\n      \u003cth\u003emin\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e4.00\u003c\/td\u003e\n\u003ctd\u003e3.52\u003c\/td\u003e\n\u003ctd\u003e2.50\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e7.64\u003c\/td\u003e\n\u003ctd\u003e11.30\u003c\/td\u003e\n\u003ctd\u003e9.93\u003c\/td\u003e\n\u003ctd\u003e6.70\u003c\/td\u003e\n\u003ctd\u003e~1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003ctd\u003e5.00\u003c\/td\u003e\n\u003ctd\u003e4.52\u003c\/td\u003e\n\u003ctd\u003e3.20\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e9.64\u003c\/td\u003e\n\u003ctd\u003e14.10\u003c\/td\u003e\n\u003ctd\u003e12.53\u003c\/td\u003e\n\u003ctd\u003e8.70\u003c\/td\u003e\n\u003ctd\u003e~2.8\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e1.25\u003c\/td\u003e\n\u003ctd\u003e6.50\u003c\/td\u003e\n\u003ctd\u003e5.92\u003c\/td\u003e\n\u003ctd\u003e4.10\u003c\/td\u003e\n\u003ctd\u003e13.00\u003c\/td\u003e\n\u003ctd\u003e12.57\u003c\/td\u003e\n\u003ctd\u003e18.40\u003c\/td\u003e\n\u003ctd\u003e16.34\u003c\/td\u003e\n\u003ctd\u003e11.50\u003c\/td\u003e\n\u003ctd\u003e~6.1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e1.5\u003c\/td\u003e\n\u003ctd\u003e8.00\u003c\/td\u003e\n\u003ctd\u003e7.42\u003c\/td\u003e\n\u003ctd\u003e5.20\u003c\/td\u003e\n\u003ctd\u003e17.00\u003c\/td\u003e\n\u003ctd\u003e16.57\u003c\/td\u003e\n\u003ctd\u003e24.00\u003c\/td\u003e\n\u003ctd\u003e21.54\u003c\/td\u003e\n\u003ctd\u003e14.50\u003c\/td\u003e\n\u003ctd\u003e~11.6\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e1.75\u003c\/td\u003e\n\u003ctd\u003e10.00\u003c\/td\u003e\n\u003ctd\u003e9.42\u003c\/td\u003e\n\u003ctd\u003e6.60\u003c\/td\u003e\n\u003ctd\u003e19.00\u003c\/td\u003e\n\u003ctd\u003e18.57\u003c\/td\u003e\n\u003ctd\u003e26.90\u003c\/td\u003e\n\u003ctd\u003e24.02\u003c\/td\u003e\n\u003ctd\u003e16.50\u003c\/td\u003e\n\u003ctd\u003e~17.1\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e13.00\u003c\/td\u003e\n\u003ctd\u003e12.30\u003c\/td\u003e\n\u003ctd\u003e8.60\u003c\/td\u003e\n\u003ctd\u003e24.00\u003c\/td\u003e\n\u003ctd\u003e23.16\u003c\/td\u003e\n\u003ctd\u003e33.90\u003c\/td\u003e\n\u003ctd\u003e30.11\u003c\/td\u003e\n\u003ctd\u003e22.00\u003c\/td\u003e\n\u003ctd\u003e~38.2\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size:0.85em;color:#666;\"\u003e* Dimensions per DIN 557. Unit weight values are approximate references for SUS316 material density (7.98 g\/cm³). Actual weight may vary slightly by batch. Data is strictly informative.\u003c\/p\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:center;\"\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 \/ offshore \/ boat fittings\u003c\/td\u003e\n\u003ctd\u003eM5 – M16\u003c\/td\u003e\n\u003ctd\u003eA4 SUS316 resists saltwater \u0026amp; chloride corrosion\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChemical processing equipment\u003c\/td\u003e\n\u003ctd\u003eM8 – M16\u003c\/td\u003e\n\u003ctd\u003eMolybdenum content enhances acid resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFood \u0026amp; beverage \/ pharmaceutical\u003c\/td\u003e\n\u003ctd\u003eM5 – M12\u003c\/td\u003e\n\u003ctd\u003eNon-contaminating, easy to clean, hygienic surface\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoastal \u0026amp; outdoor infrastructure\u003c\/td\u003e\n\u003ctd\u003eM8 – M16\u003c\/td\u003e\n\u003ctd\u003eLong-term corrosion resistance in humid salt-air\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eT-slot \/ channel framing systems\u003c\/td\u003e\n\u003ctd\u003eM8 – M12\u003c\/td\u003e\n\u003ctd\u003eSquare profile locks into slot without rotation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSwimming pools \/ water treatment\u003c\/td\u003e\n\u003ctd\u003eM6 – M12\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 \u0026amp; Compliance\u003c\/h2\u003e\n\u003cp\u003eFULLERKREG DIN 557 A4 chamfered square nuts comply with the following standards:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN 557\u003c\/strong\u003e — Chamfered Square Nuts; defines geometry, tolerances, and thread engagement\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 3506-2\u003c\/strong\u003e — Mechanical properties of stainless steel nuts (Property Class A4-70)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eISO 68-1\u003c\/strong\u003e — Metric screw thread profile\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eASTM A276 \/ AISI 316\u003c\/strong\u003e — Equivalent material cross-reference for North American markets\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoHS Directive\u003c\/strong\u003e — Restriction of Hazardous Substances compliant\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Surface\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Austenitic Marine Stainless Steel SUS316 \/ AISI 316 \/ EN 1.4401 (A4)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey Alloying Element:\u003c\/strong\u003e 2–3% Molybdenum (Mo) — significantly enhances pitting and crevice corrosion resistance vs. A2\/SUS304\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e Pickled \u0026amp; Passivated — bright, oxide-free finish that maximizes the natural chromium oxide passive layer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile Strength:\u003c\/strong\u003e ≥ 700 MPa (A4-70)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProof Load Stress:\u003c\/strong\u003e Per ISO 3506-2 Annex F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eA4 vs A2:\u003c\/strong\u003e A4 (SUS316) contains molybdenum, providing significantly better resistance to chlorides, acids, and marine environments compared to A2 (SUS304)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\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;border:1px solid #e0e0e0;padding:12px;\"\u003e[Product Image 1]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;border:1px solid #e0e0e0;padding:12px;\"\u003e[Product Image 2]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;border:1px solid #e0e0e0;padding:12px;\"\u003e[Product Image 3]\u003c\/td\u003e\n      \u003ctd style=\"width:25%;vertical-align:top;border:1px solid #e0e0e0;padding:12px;\"\u003e[Product Image 4]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy FULLERKREG\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect Manufacturer\u003c\/strong\u003e — Factory-direct pricing with full traceability from raw material to finished fastener\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003ePrecision Conformance\u003c\/strong\u003e — Strict dimensional inspection per DIN 557; CMM-verified critical dimensions\u003c\/li\u003e\n  \u003cli\u003e🔬 \u003cstrong\u003eMaterial Certification\u003c\/strong\u003e — Mill test reports (MTR), RoHS \u0026amp; material composition certificates available on request\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eFlexible MOQ\u003c\/strong\u003e — Bulk pallet quantities or sample packs; custom packaging available\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal Shipping\u003c\/strong\u003e — Export experience to 50+ countries; sea, air, and express logistics supported\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eFast Lead Time\u003c\/strong\u003e — In-stock standard sizes ship within 3–5 business days\u003c\/li\u003e\n  \u003cli\u003e🤝 \u003cstrong\u003eB2B Wholesale\u003c\/strong\u003e — Volume pricing tiers, OEM labeling, and long-term supply agreements available\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"din-557-a4-m6","title":"M6-1.0 Chamfered Square Nuts (DIN 557) - Marine Stainless Steel (A4)-10000 Pcs per Carton","description":"\u003cp\u003e19\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44514764161135,"sku":"DIN 557-A4-M6","price":340.0,"currency_code":"USD","in_stock":true}]},{"product_id":"din-557-a4-m8","title":"M8-1.25 Chamfered Square Nuts (DIN 557) - Marine Stainless Steel (A4)-4500 Pcs per Carton","description":"\u003cp\u003e20\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44514764193903,"sku":"DIN 557-A4-M8","price":301.5,"currency_code":"USD","in_stock":true}]},{"product_id":"din-557-a4-m10","title":"M10-1.5 Chamfered Square Nuts (DIN 557) - Marine Stainless Steel (A4)-2500 Pcs per Carton","description":"\u003cp\u003e21\u003c\/p\u003e","brand":"Fullerkreg Fasteners","offers":[{"title":"Default Title","offer_id":44514764226671,"sku":"DIN 557-A4-M10","price":345.0,"currency_code":"USD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0054\/6317\/9375\/collections\/DIN_557_57ce1beb-af89-42c3-baaf-5f3300769b57.webp?v=1770529390","url":"https:\/\/www.fullerkr.com\/collections\/din557-a4.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}