{
 "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": "thick-washers-din-7349",
 "name": "Thick washers, DIN 7349: M3–M30 bore, outside diameter, thickness",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What bore, outside diameter and thickness does a DIN 7349 thick washer have for M3 to M30?",
 "tags": [
  "din 7349",
  "thick washer",
  "heavy washer",
  "washer for spring pins",
  "heavy duty washer"
 ],
 "aliases": [
  "din 7349 dimensions",
  "thick washer m8 21 mm",
  "heavy washer m12 6 mm thick",
  "washer for heavy spring pin",
  "m10 thick washer"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 14,
 "url": "https://xemstudio.com/objects/thick-washers-din-7349/",
 "sheet_txt": "https://xemstudio.com/objects/thick-washers-din-7349/sheet.txt",
 "sheet": {
  "basis": "KIPP K1968 DIN 7349 table (D1, D2, H), cross-checked against norelem 07305-05 and Würth / Kramp DIN 7349 listings",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Columns: thread, bore d1, outside diameter d2, thickness s. KIPP and norelem list identical values (e.g. M8: 8.4 × 21 × 4).",
   "Used under bolts with heavy-duty spring pins (DIN 1481). M18 is not drawn here."
  ],
  "table": {
   "columns": [
    "thread",
    "d1",
    "d2",
    "s"
   ],
   "rows": [
    [
     "M3",
     "3.2",
     "9",
     "1"
    ],
    [
     "M4",
     "4.3",
     "12",
     "1.6"
    ],
    [
     "M5",
     "5.3",
     "15",
     "2"
    ],
    [
     "M6",
     "6.4",
     "17",
     "3"
    ],
    [
     "M8",
     "8.4",
     "21",
     "4"
    ],
    [
     "M10",
     "10.5",
     "25",
     "4"
    ],
    [
     "M12",
     "13",
     "30",
     "6"
    ],
    [
     "M14",
     "15",
     "36",
     "6"
    ],
    [
     "M16",
     "17",
     "40",
     "6"
    ],
    [
     "M20",
     "21",
     "44",
     "8"
    ],
    [
     "M22",
     "23",
     "50",
     "8"
    ],
    [
     "M24",
     "25",
     "50",
     "10"
    ],
    [
     "M27",
     "28",
     "60",
     "10"
    ],
    [
     "M30",
     "31",
     "68",
     "10"
    ]
   ]
  }
 },
 "sheet_text": "Thick washers, DIN 7349: M3–M30 bore, outside diameter, thickness — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/thick-washers-din-7349/  (sheet CC BY 4.0)\nBasis: KIPP K1968 DIN 7349 table (D1, D2, H), cross-checked against norelem 07305-05 and Würth / Kramp DIN 7349 listings\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Columns: thread, bore d1, outside diameter d2, thickness s. KIPP and norelem list identical values (e.g. M8: 8.4 × 21 × 4).\n- Used under bolts with heavy-duty spring pins (DIN 1481). M18 is not drawn here.\n\nthread  d1  d2  s\nM3  3.2  9  1\nM4  4.3  12  1.6\nM5  5.3  15  2\nM6  6.4  17  3\nM8  8.4  21  4\nM10  10.5  25  4\nM12  13  30  6\nM14  15  36  6\nM16  17  40  6\nM20  21  44  8\nM22  23  50  8\nM24  25  50  10\nM27  28  60  10\nM30  31  68  10\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- KIPP (via Marek): K1968 washers DIN 7349: D1, D2, H — web — Publisher's page; dimensions are facts — https://www.marek.eu/data/katalogove-listy/kipp/K1968.pdf\n- norelem (via Marek): 07305-05 washers DIN 7349 — web — Publisher's page; dimensions are facts — https://www.marek.eu/data/katalogove-listy/norelem/07305-05.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 14 parts): https://xemstudio.com/files/hardware/thick-washers-din-7349/index.json\nAPI: https://xemstudio.com/api/geometry?object=thick-washers-din-7349\n",
 "sources": [
  {
   "publisher": "KIPP (via Marek)",
   "title": "K1968 washers DIN 7349: D1, D2, H",
   "url": "https://www.marek.eu/data/katalogove-listy/kipp/K1968.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "norelem (via Marek)",
   "title": "07305-05 washers DIN 7349",
   "url": "https://www.marek.eu/data/katalogove-listy/norelem/07305-05.pdf",
   "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": [
  "flat-washers-metric",
  "large-washers-din-9021-iso-7093",
  "spring-pins-iso-8752-8750-asme-b18-8-2"
 ],
 "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: 3.2 (M3) to 31 (M30); M8 8.4",
   "mates": "bolt shank; bolts with heavy spring pins DIN 1481",
   "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 thick is an M8 DIN 7349 washer?",
   "a": "4 mm: 8.4 mm bore, 21 mm outside."
  },
  {
   "q": "What is DIN 7349 used for?",
   "a": "Bolts with heavy-duty spring pins (DIN 1481) and other joints that need a stiffer, thicker washer than DIN 125."
  }
 ],
 "files_license": null,
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   "note": "DIN 7349 M3: 3.2 × Ø9 × 1"
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   "stl": "https://xemstudio.com/files/hardware/thick-washers-din-7349/din7349-m4.stl",
   "note": "DIN 7349 M4: 4.3 × Ø12 × 1.6"
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   "note": "DIN 7349 M5: 5.3 × Ø15 × 2"
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   "note": "DIN 7349 M6: 6.4 × Ø17 × 3"
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   "stl": "https://xemstudio.com/files/hardware/thick-washers-din-7349/din7349-m8.stl",
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   "note": "DIN 7349 M14: 15 × Ø36 × 6"
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   "note": "DIN 7349 M16: 17 × Ø40 × 6"
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   "note": "DIN 7349 M20: 21 × Ø44 × 8"
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   "note": "DIN 7349 M22: 23 × Ø50 × 8"
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   "note": "DIN 7349 M24: 25 × Ø50 × 10"
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   "note": "DIN 7349 M27: 28 × Ø60 × 10"
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   "note": "DIN 7349 M30: 31 × Ø68 × 10"
  }
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 "markdown": "https://xemstudio.com/objects/thick-washers-din-7349/index.md"
}