{
 "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": "cap-nuts-low-din-917",
 "name": "Hexagon cap nuts, low type, DIN 917: M4–M12 width across flats, height, dome radius, thread depth",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What are the DIN 917 low cap nut dimensions (across flats, height, dome radius, thread depth) for M4 to M12?",
 "tags": [
  "din 917",
  "cap nut",
  "acorn nut low",
  "dome nut",
  "hex cap nut",
  "fastener"
 ],
 "aliases": [
  "din 917 dimensions",
  "low cap nut m6 height",
  "m8 dome nut 13 mm",
  "din 917 thread depth",
  "low acorn nut m10"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 6,
 "url": "https://xemstudio.com/objects/cap-nuts-low-din-917/",
 "sheet_txt": "https://xemstudio.com/objects/cap-nuts-low-din-917/sheet.txt",
 "sheet": {
  "basis": "KIPP K1801 DIN 917 table (D, T min, H, SW, E, R), cross-checked against Böllhoff DIN 917 data sheets (M4–M8) and fasten.it's DIN 917 table",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Columns: thread, width across flats s, total height h, dome radius r, minimum thread depth t. Böllhoff gives the same h, s, r and t min for M4–M8.",
   "M10 is drawn at SW17 and M12 at SW19 (KIPP); older editions also list SW16 and SW18. Thread drawn as a blind plain bore at the major diameter."
  ],
  "table": {
   "columns": [
    "thread",
    "s",
    "h",
    "r",
    "t"
   ],
   "rows": [
    [
     "M4",
     "7",
     "5.5",
     "8",
     "4.16"
    ],
    [
     "M5",
     "8",
     "7",
     "10",
     "4.96"
    ],
    [
     "M6",
     "10",
     "9",
     "12",
     "6.71"
    ],
    [
     "M8",
     "13",
     "12",
     "15",
     "9.21"
    ],
    [
     "M10",
     "17",
     "14",
     "20",
     "10.65"
    ],
    [
     "M12",
     "19",
     "16",
     "25",
     "13.15"
    ]
   ]
  }
 },
 "sheet_text": "Hexagon cap nuts, low type, DIN 917: M4–M12 width across flats, height, dome radius, thread depth — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/cap-nuts-low-din-917/  (sheet CC BY 4.0)\nBasis: KIPP K1801 DIN 917 table (D, T min, H, SW, E, R), cross-checked against Böllhoff DIN 917 data sheets (M4–M8) and fasten.it's DIN 917 table\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Columns: thread, width across flats s, total height h, dome radius r, minimum thread depth t. Böllhoff gives the same h, s, r and t min for M4–M8.\n- M10 is drawn at SW17 and M12 at SW19 (KIPP); older editions also list SW16 and SW18. Thread drawn as a blind plain bore at the major diameter.\n\nthread  s  h  r  t\nM4  7  5.5  8  4.16\nM5  8  7  10  4.96\nM6  10  9  12  6.71\nM8  13  12  15  9.21\nM10  17  14  20  10.65\nM12  19  16  25  13.15\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- KIPP (via Marek): K1801 hex cap nut, low style DIN 917: D, T, H, SW, E, R — web — Publisher's page; dimensions are facts — https://www.marek.eu/data/katalogove-listy/kipp/K1801.pdf\n- Böllhoff: DIN 917 hexagon cap nuts, low form, data sheet — web — Publisher's page; dimensions are facts — https://eshop-hu.boellhoff.com/out/media/pdf/DIN_917_Stahl_06_AU___en.pdf\n- fasten.it: DIN 917 hexagon cap nuts, low type — web — Publisher's page; dimensions are facts — https://www.fasten.it/Search/Suppliers/107\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 6 parts): https://xemstudio.com/files/hardware/cap-nuts-low-din-917/index.json\nAPI: https://xemstudio.com/api/geometry?object=cap-nuts-low-din-917\n",
 "sources": [
  {
   "publisher": "KIPP (via Marek)",
   "title": "K1801 hex cap nut, low style DIN 917: D, T, H, SW, E, R",
   "url": "https://www.marek.eu/data/katalogove-listy/kipp/K1801.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Böllhoff",
   "title": "DIN 917 hexagon cap nuts, low form, data sheet",
   "url": "https://eshop-hu.boellhoff.com/out/media/pdf/DIN_917_Stahl_06_AU___en.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "fasten.it",
   "title": "DIN 917 hexagon cap nuts, low type",
   "url": "https://www.fasten.it/Search/Suppliers/107",
   "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": [
  "acorn-cap-nuts-din-1587",
  "hex-nuts-metric",
  "flange-nuts-din-6923"
 ],
 "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 (blind plain bore at the major Ø)",
   "exact": "d, min. depth t: M4 4.16 to M12 13.15; M8 9.21",
   "mates": "screw or stud; its end must stop short of t",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "hexagon",
   "exact": "s across flats: 7 (M4) to 19 (M12); M8 13",
   "mates": "wrench or socket",
   "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 tall is an M8 low cap nut?",
   "a": "DIN 917 M8: 12 mm tall, 13 mm across flats, R15 dome, at least 9.21 mm of thread."
  },
  {
   "q": "How is DIN 917 different from DIN 1587?",
   "a": "DIN 917 is the low type: an M8 is 12 mm tall against 15 mm for the DIN 1587 acorn nut."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "din917-m4",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m4.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m4.stl",
   "note": "DIN 917 M4: SW7, h 5.5, dome R8, thread depth 4.16"
  },
  {
   "file": "din917-m5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m5.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m5.stl",
   "note": "DIN 917 M5: SW8, h 7, dome R10, thread depth 4.96"
  },
  {
   "file": "din917-m6",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m6.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m6.stl",
   "note": "DIN 917 M6: SW10, h 9, dome R12, thread depth 6.71"
  },
  {
   "file": "din917-m8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m8.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m8.stl",
   "note": "DIN 917 M8: SW13, h 12, dome R15, thread depth 9.21"
  },
  {
   "file": "din917-m10",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m10.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m10.stl",
   "note": "DIN 917 M10: SW17, h 14, dome R20, thread depth 10.65"
  },
  {
   "file": "din917-m12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m12.step",
   "stl": "https://xemstudio.com/files/hardware/cap-nuts-low-din-917/din917-m12.stl",
   "note": "DIN 917 M12: SW19, h 16, dome R25, thread depth 13.15"
  }
 ],
 "markdown": "https://xemstudio.com/objects/cap-nuts-low-din-917/index.md"
}