{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "flat-washers-iso-7090-m5-m64",
 "name": "Flat washers, ISO 7090 (chamfered, normal series): M5–M64 bore, outside diameter, thickness + M30–M48 washer files",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What are the ISO 7090 washer dimensions, and how big is an M30 or M36 flat washer?",
 "tags": [
  "iso 7090",
  "chamfered washer",
  "din 125 b",
  "flat washer",
  "plain washer",
  "m30 washer",
  "m36 washer",
  "fastener"
 ],
 "aliases": [
  "iso 7090 washer dimensions",
  "m30 flat washer dimensions",
  "m36 washer outside diameter",
  "din 125 b washer",
  "m48 washer thickness",
  "m20 washer iso 7090",
  "chamfered flat washer m12",
  "iso 7090 m24 44 mm",
  "washer size chart m5 to m64",
  "m42 washer 78 mm"
 ],
 "overall_mm": {
  "length": 110,
  "width": 110,
  "height": 8
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 4,
 "url": "https://xemstudio.com/objects/flat-washers-iso-7090-m5-m64/",
 "sheet_txt": "https://xemstudio.com/objects/flat-washers-iso-7090-m5-m64/sheet.txt",
 "sheet": {
  "basis": "Westfield Fasteners' ISO 7090 table (M5 to M64), cross-checked on M10 against McMaster-Carr's DIN 125 / ISO 7089 listings; four large-size washer files",
  "overall_mm": {
   "length": 110,
   "width": 110,
   "height": 8
  },
  "notes": [
   "ISO 7090 is the normal-series plain washer with a chamfered outside edge, product grade A, in 200 HV and 300 HV. Westfield's page says it replaces type B of DIN 125. Columns in mm: bore d1 (nominal = minimum, then maximum), outside d2 (nominal = maximum, then minimum), thickness h (nominal, max, min). Sizes in brackets are non-preferred, as printed.",
   "Conflict kept: Westfield prints d2 = 21 for M10 with a minimum of 19.48. A nominal of 21 would give a minimum of about 20.5, and McMaster-Carr's DIN 125 / ISO 7089 M10 washers are listed at 10.5 mm bore by 20 mm outside, the same as the existing page flat-washers-metric-m10-m24. The M10 outside diameter is therefore uncertain here (20 or 21); no M10 file is made.",
   "The chamfer size and angle are not given in the Westfield page, so the files are plain annuli at M30, M36, M42 and M48 (larger than the M2–M24 sizes already on this site). Hardness classes: 200 HV (HV 200–300) and 300 HV (HV 300–400); stainless is 200 HV only (Westfield).",
   "Smaller sizes: flat-washers-metric (M2–M8) and flat-washers-metric-m10-m24 (ISO 7089 / DIN 125-A). Large-OD version: large-washers-din-9021-iso-7093."
  ],
  "table": {
   "columns": [
    "thread",
    "d1 nom = min",
    "d1 max",
    "d2 nom = max",
    "d2 min",
    "h nom",
    "h max",
    "h min"
   ],
   "rows": [
    [
     "M5",
     "5.3",
     "5.48",
     "10",
     "9.64",
     "1",
     "1.1",
     "0.9"
    ],
    [
     "M6",
     "6.4",
     "6.62",
     "12",
     "11.57",
     "1.6",
     "1.8",
     "1.4"
    ],
    [
     "M8",
     "8.4",
     "8.62",
     "16",
     "15.57",
     "1.6",
     "1.8",
     "1.4"
    ],
    [
     "M10",
     "10.5",
     "10.77",
     "21 (as printed; see notes)",
     "19.48",
     "2",
     "2.2",
     "1.8"
    ],
    [
     "M12",
     "13",
     "13.27",
     "24",
     "23.48",
     "2.5",
     "2.7",
     "2.3"
    ],
    [
     "(M14)",
     "15",
     "15.27",
     "28",
     "27.48",
     "2.5",
     "2.7",
     "2.3"
    ],
    [
     "M16",
     "17",
     "17.27",
     "30",
     "29.48",
     "3",
     "3.3",
     "2.7"
    ],
    [
     "(M18)",
     "19",
     "19.33",
     "34",
     "33.38",
     "3",
     "3.3",
     "2.7"
    ],
    [
     "M20",
     "21",
     "21.33",
     "37",
     "36.38",
     "3",
     "3.3",
     "2.7"
    ],
    [
     "(M22)",
     "23",
     "23.33",
     "39",
     "38.38",
     "3",
     "3.3",
     "2.7"
    ],
    [
     "M24",
     "25",
     "25.33",
     "44",
     "43.38",
     "4",
     "4.3",
     "3.7"
    ],
    [
     "(M27)",
     "28",
     "28.33",
     "50",
     "49.38",
     "4",
     "4.3",
     "3.7"
    ],
    [
     "M30",
     "31",
     "31.39",
     "56",
     "55.26",
     "4",
     "4.3",
     "3.7"
    ],
    [
     "(M33)",
     "34",
     "34.62",
     "60",
     "58.8",
     "5",
     "5.6",
     "4.4"
    ],
    [
     "M36",
     "37",
     "37.62",
     "64.8",
     "64.8",
     "5",
     "5.6",
     "4.4"
    ],
    [
     "(M39)",
     "42",
     "42.62",
     "72",
     "70.8",
     "6",
     "6.6",
     "5.4"
    ],
    [
     "M42",
     "45",
     "45.62",
     "78",
     "76.8",
     "8",
     "9",
     "7"
    ],
    [
     "(M45)",
     "48",
     "48.62",
     "85",
     "83.6",
     "8",
     "9",
     "7"
    ],
    [
     "M48",
     "52",
     "52.74",
     "92",
     "90.6",
     "8",
     "9",
     "7"
    ],
    [
     "(M52)",
     "56",
     "56.74",
     "98",
     "96.6",
     "8",
     "9",
     "7"
    ],
    [
     "M56",
     "62",
     "62.74",
     "105",
     "103.6",
     "10",
     "11",
     "9"
    ],
    [
     "(M60)",
     "66",
     "66.74",
     "110",
     "108.6",
     "10",
     "11",
     "9"
    ],
    [
     "M64",
     "70",
     "70.74",
     "115",
     "113.6",
     "10",
     "11",
     "9"
    ]
   ]
  }
 },
 "sheet_text": "Flat washers, ISO 7090 (chamfered, normal series): M5–M64 bore, outside diameter, thickness + M30–M48 washer files — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/flat-washers-iso-7090-m5-m64/  (sheet CC BY 4.0)\nBasis: Westfield Fasteners' ISO 7090 table (M5 to M64), cross-checked on M10 against McMaster-Carr's DIN 125 / ISO 7089 listings; four large-size washer files\nCatalog version: 2026-10-20\n\nOverall (mm): length 110.0, width 110.0, height 8.0\n- ISO 7090 is the normal-series plain washer with a chamfered outside edge, product grade A, in 200 HV and 300 HV. Westfield's page says it replaces type B of DIN 125. Columns in mm: bore d1 (nominal = minimum, then maximum), outside d2 (nominal = maximum, then minimum), thickness h (nominal, max, min). Sizes in brackets are non-preferred, as printed.\n- Conflict kept: Westfield prints d2 = 21 for M10 with a minimum of 19.48. A nominal of 21 would give a minimum of about 20.5, and McMaster-Carr's DIN 125 / ISO 7089 M10 washers are listed at 10.5 mm bore by 20 mm outside, the same as the existing page flat-washers-metric-m10-m24. The M10 outside diameter is therefore uncertain here (20 or 21); no M10 file is made.\n- The chamfer size and angle are not given in the Westfield page, so the files are plain annuli at M30, M36, M42 and M48 (larger than the M2–M24 sizes already on this site). Hardness classes: 200 HV (HV 200–300) and 300 HV (HV 300–400); stainless is 200 HV only (Westfield).\n- Smaller sizes: flat-washers-metric (M2–M8) and flat-washers-metric-m10-m24 (ISO 7089 / DIN 125-A). Large-OD version: large-washers-din-9021-iso-7093.\n\nthread  d1 nom = min  d1 max  d2 nom = max  d2 min  h nom  h max  h min\nM5  5.3  5.48  10  9.64  1  1.1  0.9\nM6  6.4  6.62  12  11.57  1.6  1.8  1.4\nM8  8.4  8.62  16  15.57  1.6  1.8  1.4\nM10  10.5  10.77  21 (as printed; see notes)  19.48  2  2.2  1.8\nM12  13  13.27  24  23.48  2.5  2.7  2.3\n(M14)  15  15.27  28  27.48  2.5  2.7  2.3\nM16  17  17.27  30  29.48  3  3.3  2.7\n(M18)  19  19.33  34  33.38  3  3.3  2.7\nM20  21  21.33  37  36.38  3  3.3  2.7\n(M22)  23  23.33  39  38.38  3  3.3  2.7\nM24  25  25.33  44  43.38  4  4.3  3.7\n(M27)  28  28.33  50  49.38  4  4.3  3.7\nM30  31  31.39  56  55.26  4  4.3  3.7\n(M33)  34  34.62  60  58.8  5  5.6  4.4\nM36  37  37.62  64.8  64.8  5  5.6  4.4\n(M39)  42  42.62  72  70.8  6  6.6  5.4\nM42  45  45.62  78  76.8  8  9  7\n(M45)  48  48.62  85  83.6  8  9  7\nM48  52  52.74  92  90.6  8  9  7\n(M52)  56  56.74  98  96.6  8  9  7\nM56  62  62.74  105  103.6  10  11  9\n(M60)  66  66.74  110  108.6  10  11  9\nM64  70  70.74  115  113.6  10  11  9\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Westfield Fasteners: ISO 7090 plain washers, chamfered, normal series, M5 to M64: d1, d2, h (nom / max / min) — web — Publisher's page; dimensions are facts — https://westfieldfasteners.co.uk/Standards/Washer-ISO7090-M.pdf\n- McMaster-Carr: DIN 125 A flat washers (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/din-125a-flat-washers\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/index.json\nAPI: https://xemstudio.com/api/geometry?object=flat-washers-iso-7090-m5-m64\n",
 "sources": [
  {
   "publisher": "Westfield Fasteners",
   "title": "ISO 7090 plain washers, chamfered, normal series, M5 to M64: d1, d2, h (nom / max / min)",
   "url": "https://westfieldfasteners.co.uk/Standards/Washer-ISO7090-M.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "DIN 125 A flat washers (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/din-125a-flat-washers",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "flat-washers-metric",
  "flat-washers-metric-m10-m24",
  "large-washers-din-9021-iso-7093",
  "spring-lock-washers-din-127-b",
  "hex-nuts-metric-m10-m24"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "bore (d1)",
   "exact": "M30 31, M36 37, M42 45, M48 52 mm nominal",
   "mates": "bolt of the thread size; plain cylinder",
   "fit": "designed",
   "files": "washer-iso-7090-"
  },
  {
   "feature": "outside (d2)",
   "exact": "M30 56, M36 64.8, M42 78, M48 92 mm",
   "mates": "round counterbore that seats the washer: Ø = d2 + your process clearance",
   "fit": "slide",
   "files": "washer-iso-7090-"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What is the outside diameter of an M30 ISO 7090 washer?",
   "a": "56 mm maximum (nominal), 55.26 mm minimum; bore 31 mm nominal, thickness 4 mm."
  },
  {
   "q": "What is the difference between ISO 7089 and ISO 7090?",
   "a": "ISO 7090 has a chamfered outside edge; Westfield says it replaces type B of DIN 125. ISO 7089 is the plain (unchamfered) normal series."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "washer-iso-7090-m30-d1-31-d2-56-h-4",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m30-d1-31-d2-56-h-4.step",
   "stl": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m30-d1-31-d2-56-h-4.stl",
   "note": "M30 ISO 7090 washer at nominal size: bore Ø31, outside Ø56, thickness 4 mm; the outer-edge chamfer is not dimensioned in the source and is not modelled"
  },
  {
   "file": "washer-iso-7090-m36-d1-37-d2-64.8-h-5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m36-d1-37-d2-64.8-h-5.step",
   "stl": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m36-d1-37-d2-64.8-h-5.stl",
   "note": "M36 ISO 7090 washer at nominal size: bore Ø37, outside Ø64.8, thickness 5 mm; the outer-edge chamfer is not dimensioned in the source and is not modelled"
  },
  {
   "file": "washer-iso-7090-m42-d1-45-d2-78-h-8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m42-d1-45-d2-78-h-8.step",
   "stl": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m42-d1-45-d2-78-h-8.stl",
   "note": "M42 ISO 7090 washer at nominal size: bore Ø45, outside Ø78, thickness 8 mm; the outer-edge chamfer is not dimensioned in the source and is not modelled"
  },
  {
   "file": "washer-iso-7090-m48-d1-52-d2-92-h-8",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m48-d1-52-d2-92-h-8.step",
   "stl": "https://xemstudio.com/files/hardware/flat-washers-iso-7090-m5-m64/washer-iso-7090-m48-d1-52-d2-92-h-8.stl",
   "note": "M48 ISO 7090 washer at nominal size: bore Ø52, outside Ø92, thickness 8 mm; the outer-edge chamfer is not dimensioned in the source and is not modelled"
  }
 ],
 "markdown": "https://xemstudio.com/objects/flat-washers-iso-7090-m5-m64/index.md"
}