{
 "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": "keyhole-hanger-slot",
 "name": "Keyhole hanger slot",
 "kind": "hardware",
 "category": "Joinery",
 "group": "3D-print connectors",
 "year": null,
 "question": "What size is a keyhole slot for a screw?",
 "tags": [
  "joinery",
  "woodworking joint",
  "3d printable",
  "connect 3d prints",
  "no glue",
  "stl",
  "step",
  "3d-print connectors"
 ],
 "aliases": [
  "keyhole slot",
  "keyhole hanger",
  "keyhole slot dimensions",
  "keyhole mount 3d print",
  "keyhole hanger size",
  "wall hanging keyhole",
  "ranura de ojo de cerradura",
  "colgador tipo ojo de cerradura",
  "Schlüssellochaufhängung",
  "Schlüssellochschlitz"
 ],
 "overall_mm": {
  "length": 50,
  "width": 80,
  "height": 15
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 3,
 "url": "https://xemstudio.com/objects/keyhole-hanger-slot/",
 "sheet_txt": "https://xemstudio.com/objects/keyhole-hanger-slot/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design — geometry computed in the generator from traditional proportions",
  "overall_mm": {
   "length": 50,
   "width": 80,
   "height": 15
  },
  "notes": [
   "Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).",
   "The hidden hanger on the back of signs, frames and printed wall mounts: the screw head enters the round hole and the plate slides down so the head sits in the pocket behind the slot.",
   "Sized for a screw with a Ø4–4.5 mm shank and a head up to 9 mm (e.g. #8 / 4 mm pan or round heads); scale the three numbers for other screws."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "stock",
     "6 mm back plate"
    ],
    [
     "parts",
     "plate, screw stand in"
    ],
    [
     "entry hole",
     "Ø9 mm (passes the head)"
    ],
    [
     "slot",
     "4.5 mm wide, 12 mm travel"
    ],
    [
     "head pocket",
     "Ø9 mm, 3 mm deep behind the slot"
    ],
    [
     "assembles",
     "over the screw head, slide down"
    ],
    [
     "holds",
     "hangs flush on one screw; lift to remove"
    ]
   ]
  }
 },
 "sheet_text": "Keyhole hanger slot — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/keyhole-hanger-slot/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)\nBasis: Xem Studio design — geometry computed in the generator from traditional proportions\nCatalog version: 2026-10-20\n\nOverall (mm): length 50.0, width 80.0, height 15.0\n- Woodworking joint drawn for 3D printing: the parts lock together by shape, so a print can be joined without glue or screws. Drawn at true size with the parts line to line (zero gap) in their assembled position — add your printer's fit allowance to the mating faces (your AI or slicer can do this).\n- The hidden hanger on the back of signs, frames and printed wall mounts: the screw head enters the round hole and the plate slides down so the head sits in the pocket behind the slot.\n- Sized for a screw with a Ø4–4.5 mm shank and a head up to 9 mm (e.g. #8 / 4 mm pan or round heads); scale the three numbers for other screws.\n\ndimension  value\nstock  6 mm back plate\nparts  plate, screw stand in\nentry hole  Ø9 mm (passes the head)\nslot  4.5 mm wide, 12 mm travel\nhead pocket  Ø9 mm, 3 mm deep behind the slot\nassembles  over the screw head, slide down\nholds  hangs flush on one screw; lift to remove\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Xem Studio: Joinery design (geometry computed in the generator from traditional proportions) — web — Xem Studio design — https://xemstudio.com/\n\nFree files (Xem Studio Design License, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/keyhole-hanger-slot/index.json\nAPI: https://xemstudio.com/api/geometry?object=keyhole-hanger-slot\n",
 "sources": [
  {
   "publisher": "Xem Studio",
   "title": "Joinery design (geometry computed in the generator from traditional proportions)",
   "url": "https://xemstudio.com/",
   "formats": [
    "web"
   ],
   "license": "Xem Studio design",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "french-cleat",
  "snap-fit-cantilever-joint"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. 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.",
 "mating": [],
 "faq": [
  {
   "q": "How big should a keyhole be?",
   "a": "Entry hole a bit bigger than the screw head, slot a bit wider than the shank, a pocket behind for the head."
  }
 ],
 "files_license": {
  "name": "Xem Studio Design License",
  "holder": "Xem Studio",
  "url": "https://xemstudio.com/license/",
  "note": "Xem Studio's own design: free to use, print, modify and sell things made from it; not to be republished or redistributed as files."
 },
 "offers": [
  {
   "file": "keyhole-hanger-slot-plate",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-plate.step",
   "stl": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-plate.stl",
   "note": "Back plate with the keyhole: Ø9 entry, 4.5 mm slot, 3 mm deep head pocket"
  },
  {
   "file": "keyhole-hanger-slot-screw-stand-in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-screw-stand-in.step",
   "stl": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-screw-stand-in.stl",
   "note": "Stand-in screw: Ø4.5 shank, Ø9 × 2 mm head, in the locked position"
  },
  {
   "file": "keyhole-hanger-slot-assembled",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "Xem Studio Design License",
   "step": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-assembled.step",
   "stl": "https://xemstudio.com/files/hardware/keyhole-hanger-slot/keyhole-hanger-slot-assembled.stl",
   "note": "All parts in their assembled position (each part its own solid)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/keyhole-hanger-slot/index.md"
}