{"title":"DIN 7349 Thick Flat Washer – A4 Stainless","description":"\u003ch1\u003eDIN 7349 Thick Flat Washer — A4 Marine Stainless Steel (SUS316), Natural Finish\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 7349 thick flat washers are manufactured to DIN 7349 standard in A4 marine-grade stainless steel (SUS316 \/ 1.4401) with a natural cleaned and passivated finish. DIN 7349 washers are specifically designed for use with bolts that have heavy-type spring pins (DIN 7346 \/ ISO 8752), featuring a larger outer diameter and greater thickness than standard DIN 125 flat washers for superior load distribution. A4 stainless steel adds 2–3% molybdenum to the A2 (SUS304) composition, delivering significantly enhanced resistance to chloride corrosion, seawater, and aggressive chemical environments — the preferred choice for marine, offshore, and coastal applications.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 7349\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e A4 Marine Stainless Steel (SUS316 \/ 1.4401)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Natural — cleaned and passivated, bare stainless finish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAppearance:\u003c\/strong\u003e Bright silver, uniform stainless surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e M5 – M24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesigned for:\u003c\/strong\u003e Bolts with heavy-type spring pins (DIN 7346 \/ ISO 8752)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKey advantage over A2:\u003c\/strong\u003e Molybdenum addition (2–3%) — superior chloride, seawater \u0026amp; acid resistance\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eNon-magnetic (austenitic), non-sparking\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRoHS \u0026amp; REACH Compliant\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Specifications — DIN 7349 Thick Flat Washers (A4 Stainless, Natural)\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Tolerances per DIN 7349.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eNominal Size (d)\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d1\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d2\u003c\/th\u003e\n      \u003cth\u003eThickness h\u003c\/th\u003e\n      \u003cth\u003eWeight (g\/100 pcs)\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\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e114\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.4\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.4\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003ctd\u003e495\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.5\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e1,040\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e13.0\u003c\/td\u003e\n\u003ctd\u003e37\u003c\/td\u003e\n\u003ctd\u003e4.0\u003c\/td\u003e\n\u003ctd\u003e2,100\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e17.0\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e5,800\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e21.0\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e12,400\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e25.0\u003c\/td\u003e\n\u003ctd\u003e72\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e20,600\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003e* All dimensions conform to DIN 7349. Please verify with your engineering team for critical applications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMaterial \u0026amp; Mechanical Properties — A4 Stainless Steel (SUS316)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003eA4 \/ SUS316 \/ 1.4401\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSteel Group\u003c\/td\u003e\n\u003ctd\u003eAustenitic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProperty Strength Class\u003c\/td\u003e\n\u003ctd\u003e50, 70, 80\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength (Rm)\u003c\/td\u003e\n\u003ctd\u003e≥ 500 MPa (Class 50)  \/  ≥ 700 MPa (Class 70)  \/  ≥ 800 MPa (Class 80)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness (HV)\u003c\/td\u003e\n\u003ctd\u003e≤ 250 HV (Class 50\/70)  \/  ≤ 330 HV (Class 80)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003e7.98 g\/cm³\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMolybdenum (Mo) Content\u003c\/td\u003e\n\u003ctd\u003e2.0 – 3.0% — key differentiator vs. A2\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMagnetic\u003c\/td\u003e\n\u003ctd\u003eNon-magnetic (austenitic)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-196°C to +400°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS \/ REACH\u003c\/td\u003e\n\u003ctd\u003eCompliant\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003ePer DIN EN ISO 3506-1. Strength class marking: A4-50, A4-70, or A4-80.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eChemical Composition — A4 Stainless Steel (SUS316 \/ 1.4401)\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eElement\u003c\/th\u003e\n      \u003cth\u003eC (max)\u003c\/th\u003e\n      \u003cth\u003eCr\u003c\/th\u003e\n      \u003cth\u003eNi\u003c\/th\u003e\n      \u003cth\u003eMo\u003c\/th\u003e\n      \u003cth\u003eMn (max)\u003c\/th\u003e\n      \u003cth\u003eSi (max)\u003c\/th\u003e\n      \u003cth\u003eP (max)\u003c\/th\u003e\n      \u003cth\u003eS (max)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eContent (%)\u003c\/td\u003e\n      \u003ctd\u003e0.07\u003c\/td\u003e\n      \u003ctd\u003e16.5 – 18.5\u003c\/td\u003e\n      \u003ctd\u003e10.5 – 13.5\u003c\/td\u003e\n      \u003ctd\u003e2.0 – 3.0\u003c\/td\u003e\n      \u003ctd\u003e2.0\u003c\/td\u003e\n      \u003ctd\u003e1.0\u003c\/td\u003e\n      \u003ctd\u003e0.045\u003c\/td\u003e\n      \u003ctd\u003e0.030\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eA4 Stainless Steel — Property Strength Classes\u003c\/h2\u003e\n\u003cp\u003ePer DIN EN ISO 3506-1, A4 stainless steel washers are available in the following strength classes:\u003c\/p\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSteel Group\u003c\/th\u003e\n      \u003cth\u003eGrade\u003c\/th\u003e\n      \u003cth\u003eStrength Class\u003c\/th\u003e\n      \u003cth\u003eMade From\u003c\/th\u003e\n      \u003cth\u003eCharacteristics\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd rowspan=\"3\"\u003eAustenitic\u003c\/td\u003e\n      \u003ctd\u003eA4\u003c\/td\u003e\n      \u003ctd\u003e50\u003c\/td\u003e\n      \u003ctd\u003eA3, A4\u003c\/td\u003e\n      \u003ctd\u003eSoft annealed; tensile strength ≥ 500 MPa; dia. ≤ M39\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eA4\u003c\/td\u003e\n      \u003ctd\u003e70\u003c\/td\u003e\n      \u003ctd\u003eA3, A4\u003c\/td\u003e\n      \u003ctd\u003eCold worked, normal strength; tensile strength ≥ 700 MPa; dia. ≤ M39\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eA4\u003c\/td\u003e\n      \u003ctd\u003e80\u003c\/td\u003e\n      \u003ctd\u003eAC, AF\u003c\/td\u003e\n      \u003ctd\u003eExtreme cold worked, high strength; tensile strength ≥ 800 MPa; dia. ≤ M20\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eA4 vs. A2 Stainless Steel — Key Differences\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eProperty\u003c\/th\u003e\n      \u003cth\u003eA4 (SUS316)\u003c\/th\u003e\n      \u003cth\u003eA2 (SUS304)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMolybdenum (Mo)\u003c\/td\u003e\n\u003ctd\u003e2.0 – 3.0%\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eChloride resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — seawater \u0026amp; coastal\u003c\/td\u003e\n\u003ctd\u003eGood — atmospheric only\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAcid resistance\u003c\/td\u003e\n\u003ctd\u003eSuperior (sulfuric, phosphoric)\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePitting resistance\u003c\/td\u003e\n\u003ctd\u003eHigh (Mo inhibits pitting)\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax strength class\u003c\/td\u003e\n\u003ctd\u003eA4-80\u003c\/td\u003e\n\u003ctd\u003eA2-70\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRecommended environment\u003c\/td\u003e\n\u003ctd\u003eMarine, offshore, chemical, food\u003c\/td\u003e\n\u003ctd\u003eGeneral outdoor, fresh water\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCost\u003c\/td\u003e\n\u003ctd\u003eHigher (Mo premium)\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDIN 7349 vs. DIN 125 — Key Differences\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eFeature\u003c\/th\u003e\n      \u003cth\u003eDIN 7349\u003c\/th\u003e\n      \u003cth\u003eDIN 125\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eThick flat washer (heavy type)\u003c\/td\u003e\n\u003ctd\u003eStandard flat washer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003eLarger (extra-wide bearing surface)\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eGreater (heavy duty)\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDesigned for\u003c\/td\u003e\n\u003ctd\u003eBolts with heavy spring pins (DIN 7346)\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose bolts \u0026amp; screws\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLoad Distribution\u003c\/td\u003e\n\u003ctd\u003eSuperior — wider bearing area\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eHeavy machinery, structural, high-vibration\u003c\/td\u003e\n\u003ctd\u003eGeneral assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine \u0026amp; offshore structures\u003c\/strong\u003e — hulls, decks, docks, offshore platforms exposed to seawater\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoastal \u0026amp; waterfront architecture\u003c\/strong\u003e — railings, facades, bridges in salt-air environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical processing plants\u003c\/strong\u003e — resistance to sulfuric acid, phosphoric acid, and chloride solutions\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood \u0026amp; beverage processing\u003c\/strong\u003e — hygienic, easy to clean, no contamination risk\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePharmaceutical \u0026amp; medical equipment\u003c\/strong\u003e — high purity, corrosion-free surfaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeavy machinery with spring pin bolts\u003c\/strong\u003e (DIN 7346) requiring large bearing surface\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-vibration assemblies\u003c\/strong\u003e — thick washer prevents bolt head pull-through under dynamic loads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwimming pools \u0026amp; water treatment\u003c\/strong\u003e — chlorinated water resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eProduct Photo Gallery\u003c\/h2\u003e\n\u003cp\u003eReal product images — FULLERKREG DIN 7349 Thick Flat Washer, A4 Marine Stainless Steel:\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[ Photo 1 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[ Photo 2 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[ Photo 3 ]\u003c\/td\u003e\n      \u003ctd style=\"width:25%; text-align:center; padding:12px;\"\u003e[ Photo 4 ]\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003ePackaging \u0026amp; Supply\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSize\u003c\/th\u003e\n      \u003cth\u003eStandard Pack (pcs)\u003c\/th\u003e\n      \u003cth\u003eBulk Carton (pcs)\u003c\/th\u003e\n      \u003cth\u003eWeight per 100 pcs (approx.)\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\u003e100\u003c\/td\u003e\n\u003ctd\u003e5,000\u003c\/td\u003e\n\u003ctd\u003e~114 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e3,000\u003c\/td\u003e\n\u003ctd\u003e~214 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2,000\u003c\/td\u003e\n\u003ctd\u003e~495 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e1,000\u003c\/td\u003e\n\u003ctd\u003e~1,040 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e500\u003c\/td\u003e\n\u003ctd\u003e~2,100 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e~5,800 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e~12,400 g\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e~20,600 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eCustom packaging and labeling available for OEM \/ wholesale orders. Contact FULLERKREG for bulk pricing.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Choose FULLERKREG?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e🏭 \u003cstrong\u003eDirect manufacturer\u003c\/strong\u003e — factory in China, no middlemen\u003c\/li\u003e\n  \u003cli\u003e📐 \u003cstrong\u003eStrict DIN dimensional control\u003c\/strong\u003e — 100% inspection on critical dimensions\u003c\/li\u003e\n  \u003cli\u003e🌍 \u003cstrong\u003eGlobal export experience\u003c\/strong\u003e — serving distributors in Europe, North America, Southeast Asia\u003c\/li\u003e\n  \u003cli\u003e📦 \u003cstrong\u003eFlexible MOQ\u003c\/strong\u003e — small trial orders and large bulk shipments both welcome\u003c\/li\u003e\n  \u003cli\u003e📋 \u003cstrong\u003eFull documentation\u003c\/strong\u003e — material certs, RoHS declarations, test reports available\u003c\/li\u003e\n  \u003cli\u003e⚡ \u003cstrong\u003eFast lead times\u003c\/strong\u003e — standard sizes in stock, ready to ship\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is the main advantage of A4 over A2 stainless steel?\u003c\/strong\u003e\u003cbr\u003e\nA: A4 (SUS316) contains 2–3% molybdenum, which significantly enhances resistance to chloride pitting, seawater corrosion, and aggressive acids. A2 (SUS304) is suitable for general atmospheric and freshwater use, but A4 is required wherever chloride exposure is a concern.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is DIN 7349 and how does it differ from DIN 125?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 7349 is a thick flat washer designed for bolts with heavy-type spring pins (DIN 7346). Compared to DIN 125, DIN 7349 washers have a larger outer diameter and greater thickness, providing a wider bearing surface and better load distribution in heavy-duty applications.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is A4 stainless suitable for full seawater immersion?\u003c\/strong\u003e\u003cbr\u003e\nA: A4 (SUS316) performs well in seawater splash zones and salt-air environments. For continuous full immersion in seawater, super duplex or higher-grade alloys may be considered for critical structural applications. Contact FULLERKREG for application-specific guidance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What strength class are these washers supplied in?\u003c\/strong\u003e\u003cbr\u003e\nA: Standard supply is A4-70. A4-50 and A4-80 are available upon request. Please specify your required strength class when ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are these washers RoHS compliant?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG A4 stainless steel washers are fully RoHS and REACH compliant. Compliance documentation is available upon request.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do you provide material test certificates?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Mill certificates, chemical composition reports, and dimensional inspection reports are available for all orders upon request.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eFULLERKREG Fasteners\u003c\/strong\u003e — Precision DIN Standard Fasteners, Direct from Manufacturer.\u003cbr\u003e\nFor wholesale inquiries, technical questions, or custom orders, please contact our sales team.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-7349-thick-flat-washer-a4-stainless.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}