{"title":"DIN 433 Small O.D. Flat Washer Steel Zinc CR3","description":"\u003ch1\u003eDIN 433 Small O.D. Flat Washer — Low Carbon Steel, Zinc CR3\u003c\/h1\u003e\n\n\u003cp\u003eFULLERKREG DIN 433 small outer diameter flat washers are manufactured to DIN 433 \/ ISO 1580 standards in low carbon steel with a Zinc CR3 (trivalent chromium) electroplated finish. Designed for use with pan head and cheese head screws where a reduced bearing surface is required, these washers deliver reliable clamping performance in precision assemblies, electronics, and light mechanical 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 433 (equivalent to ISO 7092)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Low Carbon Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface Treatment:\u003c\/strong\u003e Zinc Electroplated, Trivalent Chromium Passivation (CR3 \/ Blue-White)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e ≥ 72 hours salt spray (neutral, NSS) per ISO 9227\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRoHS \u0026amp; REACH Compliant\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e M1.6 – M24\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Bright zinc, uniform coating, no hydrogen embrittlement risk at standard hardness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eDimensional Specifications — DIN 433 Small O.D. Flat Washers (Steel, Zinc CR3)\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in millimeters (mm). Tolerances per DIN 433 \/ ISO 7092.\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 (min)\u003c\/th\u003e\n      \u003cth\u003eInner Dia. d1 (max)\u003c\/th\u003e\n      \u003cth\u003eOuter Dia. d2 (max)\u003c\/th\u003e\n      \u003cth\u003eThickness h (min)\u003c\/th\u003e\n      \u003cth\u003eThickness h (max)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM1.6\u003c\/td\u003e\n\u003ctd\u003e1.7\u003c\/td\u003e\n\u003ctd\u003e1.84\u003c\/td\u003e\n\u003ctd\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e0.25\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e2.1\u003c\/td\u003e\n\u003ctd\u003e2.24\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e0.25\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e2.6\u003c\/td\u003e\n\u003ctd\u003e2.74\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003ctd\u003e0.45\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e3.1\u003c\/td\u003e\n\u003ctd\u003e3.28\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e0.45\u003c\/td\u003e\n\u003ctd\u003e0.55\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3.5\u003c\/td\u003e\n\u003ctd\u003e3.6\u003c\/td\u003e\n\u003ctd\u003e3.78\u003c\/td\u003e\n\u003ctd\u003e7.0\u003c\/td\u003e\n\u003ctd\u003e0.45\u003c\/td\u003e\n\u003ctd\u003e0.55\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e4.1\u003c\/td\u003e\n\u003ctd\u003e4.28\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e0.55\u003c\/td\u003e\n\u003ctd\u003e0.70\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.1\u003c\/td\u003e\n\u003ctd\u003e5.28\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e0.55\u003c\/td\u003e\n\u003ctd\u003e0.70\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e6.1\u003c\/td\u003e\n\u003ctd\u003e6.28\u003c\/td\u003e\n\u003ctd\u003e11.0\u003c\/td\u003e\n\u003ctd\u003e0.8\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e8.1\u003c\/td\u003e\n\u003ctd\u003e8.28\u003c\/td\u003e\n\u003ctd\u003e15.0\u003c\/td\u003e\n\u003ctd\u003e1.1\u003c\/td\u003e\n\u003ctd\u003e1.4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e10.1\u003c\/td\u003e\n\u003ctd\u003e10.28\u003c\/td\u003e\n\u003ctd\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM12\u003c\/td\u003e\n\u003ctd\u003e12.1\u003c\/td\u003e\n\u003ctd\u003e12.28\u003c\/td\u003e\n\u003ctd\u003e20.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM14\u003c\/td\u003e\n\u003ctd\u003e14.1\u003c\/td\u003e\n\u003ctd\u003e14.28\u003c\/td\u003e\n\u003ctd\u003e24.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM16\u003c\/td\u003e\n\u003ctd\u003e16.1\u003c\/td\u003e\n\u003ctd\u003e16.28\u003c\/td\u003e\n\u003ctd\u003e28.0\u003c\/td\u003e\n\u003ctd\u003e1.6\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM20\u003c\/td\u003e\n\u003ctd\u003e20.1\u003c\/td\u003e\n\u003ctd\u003e20.28\u003c\/td\u003e\n\u003ctd\u003e34.0\u003c\/td\u003e\n\u003ctd\u003e2.0\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM24\u003c\/td\u003e\n\u003ctd\u003e24.1\u003c\/td\u003e\n\u003ctd\u003e24.28\u003c\/td\u003e\n\u003ctd\u003e39.0\u003c\/td\u003e\n\u003ctd\u003e2.5\u003c\/td\u003e\n\u003ctd\u003e3.0\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 433 \/ ISO 7092. 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\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\u003c\/td\u003e\n\u003ctd\u003eLow Carbon Steel (C ≤ 0.20%)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eHardness (HV)\u003c\/td\u003e\n\u003ctd\u003e100 – 200 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003e≥ 300 MPa\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eZinc Electroplating + CR3 Trivalent Chromium Passivation\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCoating Thickness\u003c\/td\u003e\n\u003ctd\u003e5 – 12 μm (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSalt Spray Resistance\u003c\/td\u003e\n\u003ctd\u003e≥ 72 hours (ISO 9227 NSS)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-40°C to +120°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRoHS \/ REACH\u003c\/td\u003e\n\u003ctd\u003eCompliant — No hexavalent chromium (Cr6+)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eChemical Composition — Low Carbon Steel\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eElement\u003c\/th\u003e\n      \u003cth\u003eC\u003c\/th\u003e\n      \u003cth\u003eMn\u003c\/th\u003e\n      \u003cth\u003eP (max)\u003c\/th\u003e\n      \u003cth\u003eS (max)\u003c\/th\u003e\n      \u003cth\u003eSi\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\u003e≤ 0.20\u003c\/td\u003e\n      \u003ctd\u003e0.30 – 0.60\u003c\/td\u003e\n      \u003ctd\u003e0.045\u003c\/td\u003e\n      \u003ctd\u003e0.045\u003c\/td\u003e\n      \u003ctd\u003e≤ 0.35\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eSurface Treatment — Zinc CR3 Explained\u003c\/h2\u003e\n\u003cp\u003eCR3 (trivalent chromium) passivation is the modern, environmentally compliant alternative to traditional hexavalent chromium (CR6) coatings. FULLERKREG Zinc CR3 washers offer:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eRoHS \u0026amp; ELV compliant\u003c\/strong\u003e — no Cr6+ hazardous substances\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eBlue-white bright appearance\u003c\/strong\u003e — clean, professional finish\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e≥ 72 hours neutral salt spray\u003c\/strong\u003e resistance (ISO 9227)\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUniform coating\u003c\/strong\u003e — consistent thickness across all contact surfaces\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSuitable for indoor and light outdoor applications\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eApplication Scenarios\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eUsed with \u003cstrong\u003epan head screws\u003c\/strong\u003e (DIN 7985 \/ ISO 7045) and \u003cstrong\u003echeese head screws\u003c\/strong\u003e (DIN 84 \/ ISO 1207)\u003c\/li\u003e\n  \u003cli\u003eElectronics enclosures, control panels, and PCB assemblies\u003c\/li\u003e\n  \u003cli\u003eLight machinery, HVAC equipment, and appliance manufacturing\u003c\/li\u003e\n  \u003cli\u003eFurniture hardware and precision instrument assembly\u003c\/li\u003e\n  \u003cli\u003eAutomotive interior components and trim assemblies\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 433 Small O.D. Flat Washer, Zinc CR3 finish:\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 1000 pcs (approx.)\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e10,000\u003c\/td\u003e\n\u003ctd\u003e~0.18 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e5,000\u003c\/td\u003e\n\u003ctd\u003e~0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e3,000\u003c\/td\u003e\n\u003ctd\u003e~0.55 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e2,000\u003c\/td\u003e\n\u003ctd\u003e~1.10 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM8\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e1,000\u003c\/td\u003e\n\u003ctd\u003e~2.80 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eM10\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e500\u003c\/td\u003e\n\u003ctd\u003e~5.50 kg\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~7.20 kg\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\/ISO 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 difference between DIN 433 and DIN 125 washers?\u003c\/strong\u003e\u003cbr\u003e\nA: DIN 433 has a smaller outer diameter than DIN 125, making it suitable for use with pan head and cheese head screws where the washer must fit within the head recess area. DIN 125 is the standard flat washer for general use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is Zinc CR3 the same as galvanized?\u003c\/strong\u003e\u003cbr\u003e\nA: No. Zinc CR3 refers to electroplated zinc with trivalent chromium passivation — a thin, precise coating (5–12 μm). Hot-dip galvanizing produces a much thicker coating (45–85 μm) and is used for heavy structural applications. CR3 is preferred for precision fasteners where dimensional tolerances are critical.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Are these washers RoHS compliant?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG Zinc CR3 washers use trivalent chromium (Cr3+) passivation only — no hexavalent chromium (Cr6+). Full RoHS and REACH compliance documentation is available upon request.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I order mixed sizes?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. FULLERKREG supports mixed-size wholesale orders. Please contact us with your size breakdown and quantities for a custom quotation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Do you provide material test certificates?\u003c\/strong\u003e\u003cbr\u003e\nA: Yes. Mill certificates, dimensional inspection reports, and surface treatment test reports are available for all orders.\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-433-small-o-d-flat-washer-steel-zinc-cr3.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}