{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "hex-nuts-metric",
 "name": "Hex nuts, M2–M8 (ISO 4032)",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What size pocket does an M3 nut need in a 3D print?",
 "tags": [
  "nut",
  "fastener",
  "captive nut",
  "pocket"
 ],
 "aliases": [
  "m3 nut",
  "hex nut",
  "iso 4032",
  "din 934",
  "nut trap"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 7,
 "url": "https://xemstudio.com/objects/hex-nuts-metric/",
 "sheet_txt": "https://xemstudio.com/objects/hex-nuts-metric/sheet.txt",
 "sheet": {
  "basis": "ISO 4032 (DIN 934 matches for M2–M8; they differ at M10 and up)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Width across flats (AF) and thickness per size below. A printed nut trap: AF + 0.2–0.3 mm, thickness + 0.3 mm, and the corner-to-corner dimension is AF × 1.155.",
   "M3: 5.5 AF, 2.4 thick → print a 5.8 mm hex, 2.8 deep."
  ],
  "table": {
   "columns": [
    "thread",
    "width_af_mm",
    "corner_mm",
    "thickness_mm"
   ],
   "rows": [
    [
     "M2",
     4,
     4.6,
     1.6
    ],
    [
     "M2.5",
     5,
     5.8,
     2
    ],
    [
     "M3",
     5.5,
     6.4,
     2.4
    ],
    [
     "M4",
     7,
     8.1,
     3.2
    ],
    [
     "M5",
     8,
     9.2,
     4.7
    ],
    [
     "M6",
     10,
     11.5,
     5.2
    ],
    [
     "M8",
     13,
     15,
     6.8
    ]
   ]
  }
 },
 "sheet_text": "Hex nuts, M2–M8 (ISO 4032) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/hex-nuts-metric/  (CC BY 4.0)\nBasis: ISO 4032 (DIN 934 matches for M2–M8; they differ at M10 and up)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Width across flats (AF) and thickness per size below. A printed nut trap: AF + 0.2–0.3 mm, thickness + 0.3 mm, and the corner-to-corner dimension is AF × 1.155.\n- M3: 5.5 AF, 2.4 thick → print a 5.8 mm hex, 2.8 deep.\n\nthread  width_af_mm  corner_mm  thickness_mm\nM2  4  4.6  1.6\nM2.5  5  5.8  2\nM3  5.5  6.4  2.4\nM4  7  8.1  3.2\nM5  8  9.2  4.7\nM6  10  11.5  5.2\nM8  13  15  6.8\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- McMaster-Carr: Hex nuts (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/nuts/hex-nuts/\n- Wikipedia: Nut (hardware) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Nut_(hardware)\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 7 parts): https://xemstudio.com/files/hardware/hex-nuts-metric/index.json\nAPI: https://xemstudio.com/api/geometry?object=hex-nuts-metric\n",
 "sources": [
  {
   "publisher": "McMaster-Carr",
   "title": "Hex nuts (free STEP/IGES/STL per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/nuts/hex-nuts/",
   "formats": [
    "STEP",
    "IGES",
    "STL",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Nut (hardware)",
   "url": "https://en.wikipedia.org/wiki/Nut_(hardware)",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "socket-head-cap-screws-metric",
  "flat-washers-metric",
  "threaded-standoffs-metric"
 ],
 "faq": [
  {
   "q": "What size is an M3 nut?",
   "a": "5.5 mm across flats, 6.4 mm across corners, 2.4 mm thick (ISO 4032). Print a nut trap 5.8 mm across flats and 2.8 mm deep."
  },
  {
   "q": "What size is an M4 nut and M5 nut?",
   "a": "M4: 7 mm across flats, 3.2 mm thick. M5: 8 mm across flats, 4.7 mm thick. Across corners = AF × 1.155."
  },
  {
   "q": "How to model a captive nut pocket in a 3D print?",
   "a": "Hex pocket at AF + 0.2–0.3 mm, depth = nut thickness + 0.3 mm, slot it in from the side so the nut can't spin, and keep at least 1.5 mm of wall around the corners."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "nut-m2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m2.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m2.stl",
   "note": "ISO 4032 M2"
  },
  {
   "file": "nut-m2.5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m2.5.stl",
   "note": "ISO 4032 M2.5"
  },
  {
   "file": "nut-m3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m3.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m3.stl",
   "note": "ISO 4032 M3"
  },
  {
   "file": "nut-m4",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m4.stl",
   "note": "ISO 4032 M4"
  },
  {
   "file": "nut-m5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m5.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m5.stl",
   "note": "ISO 4032 M5"
  },
  {
   "file": "nut-m6",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m6.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m6.stl",
   "note": "ISO 4032 M6"
  },
  {
   "file": "nut-m8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m8.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-metric/nut-m8.stl",
   "note": "ISO 4032 M8"
  }
 ],
 "markdown": "https://xemstudio.com/objects/hex-nuts-metric/index.md"
}