{
 "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": "120mm-fan",
 "name": "120 mm axial fan",
 "kind": "standard",
 "category": "Power & cooling",
 "group": "Fans",
 "year": null,
 "question": "What are the mounting dimensions of a 120 mm fan?",
 "tags": [
  "fan",
  "cooling",
  "mount",
  "duct",
  "grill",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "120mm fan",
  "12025"
 ],
 "overall_mm": {
  "length": 120,
  "width": 120,
  "height": 25
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": true,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/120mm-fan/",
 "sheet_txt": "https://xemstudio.com/objects/120mm-fan/sheet.txt",
 "sheet": {
  "basis": "industry standard frame",
  "overall_mm": {
   "length": 120,
   "width": 120,
   "height": 25
  },
  "notes": [
   "Frame 120 × 120 mm; four holes on a 105 × 105 mm pattern, Ø4.3 mm; 25 mm thick is standard, 15 mm slim exists.",
   "140 mm fans use a 124.5 × 124.5 mm pattern; 80 mm use 71.5 × 71.5; 92 mm use 82.5 × 82.5."
  ],
  "mounting_holes": {
   "count": 4,
   "diameter_mm": 4.3,
   "pattern_mm": "105 x 105",
   "screw": "M4 or fan screw"
  }
 },
 "sheet_text": "120 mm axial fan — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/120mm-fan/  (CC BY 4.0)\nBasis: industry standard frame\nCatalog version: 2026-10-20\n\nOverall (mm): length 120, width 120, height 25\nMounting holes: 4 × Ø4.3 mm, pattern 105 x 105, screw M4 or fan screw\n- Frame 120 × 120 mm; four holes on a 105 × 105 mm pattern, Ø4.3 mm; 25 mm thick is standard, 15 mm slim exists.\n- 140 mm fans use a 124.5 × 124.5 mm pattern; 80 mm use 71.5 × 71.5; 92 mm use 82.5 × 82.5.\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Computer fan (dimensions table) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Computer_fan\n\nXem Studio scan: not needed; this is a published standard. The sheet is the geometry.\nAPI: https://xemstudio.com/api/geometry?object=120mm-fan\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Computer fan (dimensions table)",
   "url": "https://en.wikipedia.org/wiki/Computer_fan",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "40mm-fan",
  "socket-head-cap-screws-metric",
  "2020-extrusion"
 ],
 "faq": [
  {
   "q": "What is the 120 mm fan screw hole spacing?",
   "a": "105 × 105 mm, Ø4.3 mm holes; 25 mm thick standard, 15 mm slim exists."
  },
  {
   "q": "What is the hole spacing for 80, 92 and 140 mm fans?",
   "a": "80 mm: 71.5 × 71.5. 92 mm: 82.5 × 82.5. 140 mm: 124.5 × 124.5 (some 140s also carry 105 × 105)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/120mm-fan/index.md"
}