{"title":"DIN 433 Small OD Flat Washers — A2 Stainless Steel (SUS304), Whitened \u0026 Passivated","description":"\u003ch1\u003eDIN 433 Small OD Flat Washers — A2 Stainless Steel (SUS304), Whitened \u0026amp; Passivated\u003c\/h1\u003e\n\u003cp\u003eFULLERKREG DIN 433 flat washers are manufactured from A2 stainless steel (SUS304) with a whitened and passivated surface finish. DIN 433 specifies a \u003cstrong\u003esmall outer diameter\u003c\/strong\u003e washer — the outer diameter is significantly smaller than DIN 125A for the same bolt size — designed specifically for use with countersunk (flat head) screws, socket head cap screws in counterbored holes, and applications where space constraints prevent the use of standard DIN 125A washers.\u003c\/p\u003e\n\u003cp\u003eThe reduced OD allows the washer to seat flush within counterbores and confined spaces while still providing load distribution under the screw head. A2 (SUS304) stainless steel provides excellent corrosion resistance for general outdoor, food-grade, and mildly corrosive environments.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN 433 (Small OD flat washer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA2 Stainless Steel \/ SUS304 \/ 1.4301\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhitened \u0026amp; Passivated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eM1.6 – M20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOD Characteristic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSmall OD — significantly smaller than DIN 125A for same bolt size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 200 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTensile Strength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥ 500 MPa (A2-70)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCorrosion Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGood — outdoor, food-grade, mild corrosive environments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMagnetic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlightly magnetic after cold working\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCountersunk screws, socket head cap screws in counterbores, confined spaces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelated Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN 125A (standard OD)  |  DIN 9021 (large OD)  |  ISO 7092 (small washer series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eProduct Gallery\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\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\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eDimensions — DIN 433\u003c\/h2\u003e\n\u003cp\u003eAll dimensions in mm. Data verified against DIN 433 \/ ISO 7092 standard and reference specifications.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eNominal Size\u003c\/th\u003e\n\u003cth\u003ed1 — Inner Ø (mm)\u003c\/th\u003e\n\u003cth\u003ed2 — Outer Ø (mm)\u003c\/th\u003e\n\u003cth\u003eh — Thickness (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\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\u003e3.5\u003c\/td\u003e\n\u003ctd\u003e0.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM2\u003c\/td\u003e\n\u003ctd\u003e2.2\u003c\/td\u003e\n\u003ctd\u003e4.5\u003c\/td\u003e\n\u003ctd\u003e0.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM2.5\u003c\/td\u003e\n\u003ctd\u003e2.7\u003c\/td\u003e\n\u003ctd\u003e5.0\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3\u003c\/td\u003e\n\u003ctd\u003e3.2\u003c\/td\u003e\n\u003ctd\u003e6.0\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM3.5\u003c\/td\u003e\n\u003ctd\u003e3.7\u003c\/td\u003e\n\u003ctd\u003e7.0\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003ctd\u003e4.3\u003c\/td\u003e\n\u003ctd\u003e8.0\u003c\/td\u003e\n\u003ctd\u003e0.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM5\u003c\/td\u003e\n\u003ctd\u003e5.3\u003c\/td\u003e\n\u003ctd\u003e9.0\u003c\/td\u003e\n\u003ctd\u003e1.0\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\u003e11.0\u003c\/td\u003e\n\u003ctd\u003e1.6\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\u003e15.0\u003c\/td\u003e\n\u003ctd\u003e1.6\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\u003e18.0\u003c\/td\u003e\n\u003ctd\u003e1.6\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\u003e20.0\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\u003e15.0\u003c\/td\u003e\n\u003ctd\u003e24.0\u003c\/td\u003e\n\u003ctd\u003e2.5\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\u003e27.0\u003c\/td\u003e\n\u003ctd\u003e2.5\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\u003e34.0\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003e* d1 = inner diameter; d2 = outer diameter; h = thickness. All per DIN 433 \/ ISO 7092.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eDIN 433 vs DIN 125A — Small OD vs Standard OD\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eDIN 433 (This Product)\u003c\/th\u003e\n\u003cth\u003eDIN 125A (Standard OD)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOD characteristic\u003c\/td\u003e\n\u003ctd\u003eSmall — fits within counterbores\u003c\/td\u003e\n\u003ctd\u003eStandard — general purpose\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM6 outer diameter\u003c\/td\u003e\n\u003ctd\u003e11.0 mm\u003c\/td\u003e\n\u003ctd\u003e12.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM8 outer diameter\u003c\/td\u003e\n\u003ctd\u003e15.0 mm\u003c\/td\u003e\n\u003ctd\u003e16.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM10 outer diameter\u003c\/td\u003e\n\u003ctd\u003e18.0 mm\u003c\/td\u003e\n\u003ctd\u003e20.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM12 outer diameter\u003c\/td\u003e\n\u003ctd\u003e20.0 mm\u003c\/td\u003e\n\u003ctd\u003e24.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eCountersunk screws, counterbores, confined spaces\u003c\/td\u003e\n\u003ctd\u003eGeneral fastening, load distribution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eISO equivalent\u003c\/td\u003e\n\u003ctd\u003eISO 7092\u003c\/td\u003e\n\u003ctd\u003eISO 7089\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eMaterial Properties — A2 \/ SUS304\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDesignation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA2 \/ SUS304 \/ 1.4301 \/ 0Cr18Ni9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCr Content\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.5 – 19.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNi Content\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.0 – 10.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTensile Strength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≥ 500 MPa (annealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHardness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 200 HV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDensity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7.93 g\/cm³\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e−50°C to +300°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMagnetic\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSlightly magnetic after cold working\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🔩 \u003cstrong\u003eCountersunk (flat head) screws\u003c\/strong\u003e — the primary application: small OD fits within the countersink recess, allowing the screw to sit flush while the washer distributes load under the head\u003c\/li\u003e\n\u003cli\u003e🔧 \u003cstrong\u003eSocket head cap screws in counterbores\u003c\/strong\u003e — small OD fits within the counterbore diameter, providing load distribution without protruding beyond the bore\u003c\/li\u003e\n\u003cli\u003e🧲 \u003cstrong\u003eConfined space fastening\u003c\/strong\u003e — where standard DIN 125A OD is too large due to adjacent components, edges, or structural constraints\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003ePrecision machinery \u0026amp; instruments\u003c\/strong\u003e — small OD for clean, compact fastening in precision equipment and instruments\u003c\/li\u003e\n\u003cli\u003e🍼 \u003cstrong\u003eFood \u0026amp; pharmaceutical equipment\u003c\/strong\u003e — A2 stainless for hygienic, corrosion-resistant fastening in food processing and pharmaceutical machinery\u003c\/li\u003e\n\u003cli\u003e🏠 \u003cstrong\u003eArchitectural \u0026amp; decorative fastening\u003c\/strong\u003e — compact, clean appearance for visible fastening in architectural hardware and decorative applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the difference between DIN 433 and DIN 125A?\u003c\/strong\u003e\u003cbr\u003eA: DIN 433 has a smaller outer diameter than DIN 125A for the same bolt size. For example, M10: DIN 433 d2 = 18 mm vs DIN 125A d2 = 20 mm. DIN 433 is designed for use with countersunk screws and in confined spaces where the standard DIN 125A OD is too large. Both have the same inner diameter for the same bolt size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the ISO equivalent of DIN 433?\u003c\/strong\u003e\u003cbr\u003eA: DIN 433 is equivalent to ISO 7092 (small washer series). DIN 433 is the German national standard; ISO 7092 is the international equivalent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use DIN 433 washers with standard hex bolts?\u003c\/strong\u003e\u003cbr\u003eA: Yes. DIN 433 washers have the same inner diameter as DIN 125A for the same bolt size and can be used with any bolt or screw of the corresponding nominal diameter. The smaller OD simply provides a more compact bearing surface.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are A2 stainless DIN 433 washers suitable for outdoor use?\u003c\/strong\u003e\u003cbr\u003eA: Yes. A2 (SUS304) provides good corrosion resistance for general outdoor, architectural, and mildly corrosive environments. For marine, coastal, or high-chloride environments, specify A4 (SUS316) washers.\u003c\/p\u003e","products":[],"url":"https:\/\/www.fullerkr.com\/collections\/din-433-small-o-d-flat-washer-a2-stainless.oembed","provider":"Fullerkreg Fasteners","version":"1.0","type":"link"}