{
 "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": "round-washers-timber-din-440-r",
 "name": "Round washers for timber, DIN 440 form R: M5–M36 bore, outside diameter, thickness",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What bore, outside diameter and thickness does a DIN 440 form R timber washer have for M5 to M36?",
 "tags": [
  "din 440",
  "din 440 r",
  "timber washer",
  "wood washer",
  "large washer for wood",
  "iso 7094"
 ],
 "aliases": [
  "din 440 dimensions",
  "timber washer m12 44 mm",
  "wood construction washer m10",
  "din 440 r m16",
  "large round washer for timber m20"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 13,
 "url": "https://xemstudio.com/objects/round-washers-timber-din-440-r/",
 "sheet_txt": "https://xemstudio.com/objects/round-washers-timber-din-440-r/sheet.txt",
 "sheet": {
  "basis": "fasteners.eu DIN 440 table (d1, d2, s), cross-checked against Westfield Fasteners, globalfastener, Böllhoff and Würth listings",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Columns: thread, bore d1, outside diameter d2, thickness s. Form R has a round hole (form V has a square hole). DIN 440 was replaced by ISO 7094 but is still widely sold.",
   "M33 is omitted (sources disagree). Edges drawn sharp."
  ],
  "table": {
   "columns": [
    "thread",
    "d1",
    "d2",
    "s"
   ],
   "rows": [
    [
     "M5",
     "5.5",
     "18",
     "2"
    ],
    [
     "M6",
     "6.6",
     "22",
     "2"
    ],
    [
     "M8",
     "9",
     "28",
     "3"
    ],
    [
     "M10",
     "11",
     "34",
     "3"
    ],
    [
     "M12",
     "13.5",
     "44",
     "4"
    ],
    [
     "M14",
     "15.5",
     "50",
     "4"
    ],
    [
     "M16",
     "17.5",
     "56",
     "5"
    ],
    [
     "M20",
     "22",
     "72",
     "6"
    ],
    [
     "M22",
     "24",
     "80",
     "6"
    ],
    [
     "M24",
     "26",
     "85",
     "6"
    ],
    [
     "M27",
     "30",
     "98",
     "6"
    ],
    [
     "M30",
     "33",
     "105",
     "6"
    ],
    [
     "M36",
     "39",
     "125",
     "8"
    ]
   ]
  }
 },
 "sheet_text": "Round washers for timber, DIN 440 form R: M5–M36 bore, outside diameter, thickness — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/round-washers-timber-din-440-r/  (sheet CC BY 4.0)\nBasis: fasteners.eu DIN 440 table (d1, d2, s), cross-checked against Westfield Fasteners, globalfastener, Böllhoff and Würth listings\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Columns: thread, bore d1, outside diameter d2, thickness s. Form R has a round hole (form V has a square hole). DIN 440 was replaced by ISO 7094 but is still widely sold.\n- M33 is omitted (sources disagree). Edges drawn sharp.\n\nthread  d1  d2  s\nM5  5.5  18  2\nM6  6.6  22  2\nM8  9  28  3\nM10  11  34  3\nM12  13.5  44  4\nM14  15.5  50  4\nM16  17.5  56  5\nM20  22  72  6\nM22  24  80  6\nM24  26  85  6\nM27  30  98  6\nM30  33  105  6\nM36  39  125  8\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Westfield Fasteners: DIN 440 type R wood construction washers: d1, d2, s — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/Washer-WoodCon440R-M.html\n- Würth: Washer DIN 440 R M12, 13.5 × 44 × 4 — web — Publisher's page; dimensions are facts — https://eshop.wurth.ae/Washer-with-round-hole-Mainly-for-wood-construction-DIN-440-plain-steel-WSH-WO-DIN440-R-135X44X4/045414.sku/en/US/AED\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 13 parts): https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/index.json\nAPI: https://xemstudio.com/api/geometry?object=round-washers-timber-din-440-r\n",
 "sources": [
  {
   "publisher": "Westfield Fasteners",
   "title": "DIN 440 type R wood construction washers: d1, d2, s",
   "url": "https://www.westfieldfasteners.co.uk/Standards/Washer-WoodCon440R-M.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Würth",
   "title": "Washer DIN 440 R M12, 13.5 × 44 × 4",
   "url": "https://eshop.wurth.ae/Washer-with-round-hole-Mainly-for-wood-construction-DIN-440-plain-steel-WSH-WO-DIN440-R-135X44X4/045414.sku/en/US/AED",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "square-washers-din-436",
  "large-washers-din-9021-iso-7093",
  "flat-washers-metric",
  "carriage-bolts-asme-b18-5"
 ],
 "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",
   "exact": "d1 (M12 13.5, M24 26)",
   "mates": "bolt or coach screw of the listed thread",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "bearing face",
   "exact": "Ø d2 (M12 44, M24 85)",
   "mates": "timber surface",
   "fit": "designed",
   "files": "all"
  }
 ],
 "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": "How big is an M12 timber washer?",
   "a": "DIN 440 R M12: 13.5 mm bore, 44 mm outside, 4 mm thick."
  },
  {
   "q": "What is the difference between DIN 440 R and V?",
   "a": "R has a round hole for ordinary bolts and screws; V has a square hole that stops a carriage bolt's square neck from turning."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "din440r-m5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m5.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m5.stl",
   "note": "DIN 440R M5: 5.5 × Ø18 × 2"
  },
  {
   "file": "din440r-m6",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m6.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m6.stl",
   "note": "DIN 440R M6: 6.6 × Ø22 × 2"
  },
  {
   "file": "din440r-m8",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m8.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m8.stl",
   "note": "DIN 440R M8: 9 × Ø28 × 3"
  },
  {
   "file": "din440r-m10",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m10.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m10.stl",
   "note": "DIN 440R M10: 11 × Ø34 × 3"
  },
  {
   "file": "din440r-m12",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m12.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m12.stl",
   "note": "DIN 440R M12: 13.5 × Ø44 × 4"
  },
  {
   "file": "din440r-m14",
   "formats": [
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   ],
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   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m14.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m14.stl",
   "note": "DIN 440R M14: 15.5 × Ø50 × 4"
  },
  {
   "file": "din440r-m16",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m16.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m16.stl",
   "note": "DIN 440R M16: 17.5 × Ø56 × 5"
  },
  {
   "file": "din440r-m20",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m20.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m20.stl",
   "note": "DIN 440R M20: 22 × Ø72 × 6"
  },
  {
   "file": "din440r-m22",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m22.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m22.stl",
   "note": "DIN 440R M22: 24 × Ø80 × 6"
  },
  {
   "file": "din440r-m24",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m24.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m24.stl",
   "note": "DIN 440R M24: 26 × Ø85 × 6"
  },
  {
   "file": "din440r-m27",
   "formats": [
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m27.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m27.stl",
   "note": "DIN 440R M27: 30 × Ø98 × 6"
  },
  {
   "file": "din440r-m30",
   "formats": [
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m30.stl",
   "note": "DIN 440R M30: 33 × Ø105 × 6"
  },
  {
   "file": "din440r-m36",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m36.step",
   "stl": "https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/din440r-m36.stl",
   "note": "DIN 440R M36: 39 × Ø125 × 8"
  }
 ],
 "markdown": "https://xemstudio.com/objects/round-washers-timber-din-440-r/index.md"
}