{
 "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": "slotted-round-nuts-din-546",
 "name": "Slotted round nuts, DIN 546: M2–M20 outside diameter, height, slot width and depth",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What are the DIN 546 slotted round nut dimensions (outside diameter, height, slot width and depth) for M2 to M20?",
 "tags": [
  "din 546",
  "slotted round nut",
  "slotted nut",
  "round nut with slot",
  "screwdriver nut",
  "flat round nut"
 ],
 "aliases": [
  "din 546 dimensions",
  "slotted round nut m6",
  "m4 round nut with slot",
  "screwdriver slot nut m8 diameter",
  "din 546 m10 height"
 ],
 "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/slotted-round-nuts-din-546/",
 "sheet_txt": "https://xemstudio.com/objects/slotted-round-nuts-din-546/sheet.txt",
 "sheet": {
  "basis": "fasten.it DIN 546 table (09/2010: d1, m, n, t), cross-checked against Westfield Fasteners' DIN 546 table and spot checks of Aspen, Würth and Fabory listings",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Columns: thread, outside diameter d1, height m, slot width n, slot depth t (min–max). The model uses the midpoint of t.",
   "M12 is omitted (sources disagree on t max); M1–M1.6 are not drawn. Thread drawn as a plain bore at the major diameter."
  ],
  "table": {
   "columns": [
    "thread",
    "d1",
    "m",
    "n",
    "t min",
    "t max"
   ],
   "rows": [
    [
     "M2",
     "4.5",
     "2",
     "1",
     "0.8",
     "1.0"
    ],
    [
     "M2.5",
     "5.5",
     "2.2",
     "1.2",
     "0.9",
     "1.1"
    ],
    [
     "M3",
     "6",
     "2.5",
     "1.2",
     "1.0",
     "1.2"
    ],
    [
     "M3.5",
     "7",
     "3",
     "1.4",
     "1.0",
     "1.4"
    ],
    [
     "M4",
     "8",
     "3.5",
     "1.4",
     "1.2",
     "1.6"
    ],
    [
     "M5",
     "9",
     "4.2",
     "2",
     "1.5",
     "1.9"
    ],
    [
     "M6",
     "11",
     "5",
     "2.5",
     "2.0",
     "2.4"
    ],
    [
     "M8",
     "14",
     "6.5",
     "3",
     "2.5",
     "3.0"
    ],
    [
     "M10",
     "18",
     "8",
     "3.5",
     "3.2",
     "3.7"
    ],
    [
     "M14",
     "24",
     "11",
     "4",
     "3.8",
     "4.3"
    ],
    [
     "M16",
     "26",
     "12",
     "4",
     "3.8",
     "4.3"
    ],
    [
     "M18",
     "29",
     "13",
     "4",
     "4.8",
     "5.5"
    ],
    [
     "M20",
     "32",
     "14",
     "5",
     "4.8",
     "5.5"
    ]
   ]
  }
 },
 "sheet_text": "Slotted round nuts, DIN 546: M2–M20 outside diameter, height, slot width and depth — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/slotted-round-nuts-din-546/  (sheet CC BY 4.0)\nBasis: fasten.it DIN 546 table (09/2010: d1, m, n, t), cross-checked against Westfield Fasteners' DIN 546 table and spot checks of Aspen, Würth and Fabory listings\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Columns: thread, outside diameter d1, height m, slot width n, slot depth t (min–max). The model uses the midpoint of t.\n- M12 is omitted (sources disagree on t max); M1–M1.6 are not drawn. Thread drawn as a plain bore at the major diameter.\n\nthread  d1  m  n  t min  t max\nM2  4.5  2  1  0.8  1.0\nM2.5  5.5  2.2  1.2  0.9  1.1\nM3  6  2.5  1.2  1.0  1.2\nM3.5  7  3  1.4  1.0  1.4\nM4  8  3.5  1.4  1.2  1.6\nM5  9  4.2  2  1.5  1.9\nM6  11  5  2.5  2.0  2.4\nM8  14  6.5  3  2.5  3.0\nM10  18  8  3.5  3.2  3.7\nM14  24  11  4  3.8  4.3\nM16  26  12  4  3.8  4.3\nM18  29  13  4  4.8  5.5\nM20  32  14  5  4.8  5.5\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- fasten.it: DIN 546 slotted round nuts (09/2010): dk, m, n, t — web — Publisher's page; dimensions are facts — https://fasten.it/en/norms/norm/din_546\n- Westfield Fasteners: DIN 546 slotted round nuts: dimensions and tolerances — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/Nut-SlotRound546-M.html\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 13 parts): https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/index.json\nAPI: https://xemstudio.com/api/geometry?object=slotted-round-nuts-din-546\n",
 "sources": [
  {
   "publisher": "fasten.it",
   "title": "DIN 546 slotted round nuts (09/2010): dk, m, n, t",
   "url": "https://fasten.it/en/norms/norm/din_546",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Westfield Fasteners",
   "title": "DIN 546 slotted round nuts: dimensions and tolerances",
   "url": "https://www.westfieldfasteners.co.uk/Standards/Nut-SlotRound546-M.html",
   "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": [
  "slotted-castle-nuts-din-935",
  "knurled-nuts-din-466-467",
  "hex-nuts-metric",
  "two-hole-nuts-din-547"
 ],
 "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": "thread (plain bore at the major Ø)",
   "exact": "M2 to M20",
   "mates": "ISO metric screw or stud of the same size",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "face slot",
   "exact": "n wide × t deep (M6 2.5 × 2–2.4, M20 5 × 4.8–5.5)",
   "mates": "flat screwdriver blade or slotted-ring wrench",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "outside diameter",
   "exact": "d1 (M6 11, M20 32)",
   "mates": "counterbore for a flush fit",
   "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": "What size is an M6 slotted round nut?",
   "a": "DIN 546 M6: 11 mm outside diameter, 5 mm tall, 2.5 mm slot about 2 to 2.4 mm deep."
  },
  {
   "q": "What tightens a DIN 546 nut?",
   "a": "A flat screwdriver blade or a slotted-ring wrench (ISO 1703) in the face slot; the round body sits flush in a counterbore."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "din546-m2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m2.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m2.stl",
   "note": "DIN 546 M2: Ø4.5 × 2, slot 1 wide × 0.9 deep (midpoint of 0.8–1.0)"
  },
  {
   "file": "din546-m2.5",
   "formats": [
    "step",
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m2.5.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m2.5.stl",
   "note": "DIN 546 M2.5: Ø5.5 × 2.2, slot 1.2 wide × 1.0 deep (midpoint of 0.9–1.1)"
  },
  {
   "file": "din546-m3",
   "formats": [
    "step",
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m3.stl",
   "note": "DIN 546 M3: Ø6 × 2.5, slot 1.2 wide × 1.1 deep (midpoint of 1.0–1.2)"
  },
  {
   "file": "din546-m3.5",
   "formats": [
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   ],
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m3.5.stl",
   "note": "DIN 546 M3.5: Ø7 × 3, slot 1.4 wide × 1.2 deep (midpoint of 1.0–1.4)"
  },
  {
   "file": "din546-m4",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m4.stl",
   "note": "DIN 546 M4: Ø8 × 3.5, slot 1.4 wide × 1.4 deep (midpoint of 1.2–1.6)"
  },
  {
   "file": "din546-m5",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m5.stl",
   "note": "DIN 546 M5: Ø9 × 4.2, slot 2 wide × 1.7 deep (midpoint of 1.5–1.9)"
  },
  {
   "file": "din546-m6",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m6.stl",
   "note": "DIN 546 M6: Ø11 × 5, slot 2.5 wide × 2.2 deep (midpoint of 2.0–2.4)"
  },
  {
   "file": "din546-m8",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m8.stl",
   "note": "DIN 546 M8: Ø14 × 6.5, slot 3 wide × 2.75 deep (midpoint of 2.5–3.0)"
  },
  {
   "file": "din546-m10",
   "formats": [
    "step",
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m10.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m10.stl",
   "note": "DIN 546 M10: Ø18 × 8, slot 3.5 wide × 3.45 deep (midpoint of 3.2–3.7)"
  },
  {
   "file": "din546-m14",
   "formats": [
    "step",
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m14.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m14.stl",
   "note": "DIN 546 M14: Ø24 × 11, slot 4 wide × 4.05 deep (midpoint of 3.8–4.3)"
  },
  {
   "file": "din546-m16",
   "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/slotted-round-nuts-din-546/din546-m16.stl",
   "note": "DIN 546 M16: Ø26 × 12, slot 4 wide × 4.05 deep (midpoint of 3.8–4.3)"
  },
  {
   "file": "din546-m18",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m18.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m18.stl",
   "note": "DIN 546 M18: Ø29 × 13, slot 4 wide × 5.15 deep (midpoint of 4.8–5.5)"
  },
  {
   "file": "din546-m20",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m20.step",
   "stl": "https://xemstudio.com/files/hardware/slotted-round-nuts-din-546/din546-m20.stl",
   "note": "DIN 546 M20: Ø32 × 14, slot 5 wide × 5.15 deep (midpoint of 4.8–5.5)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/slotted-round-nuts-din-546/index.md"
}