{
 "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": "lamp-base-gu10-gu5-3",
 "name": "GU10 and GU5.3 (MR16) bi-pin lamp bases: pin spacing",
 "kind": "standard",
 "category": "Home & kitchen",
 "group": "Household",
 "year": null,
 "question": "What is the pin spacing of GU10 and GU5.3 light bulb bases?",
 "tags": [
  "light bulb",
  "lamp base",
  "mr16",
  "gu10",
  "bi-pin",
  "standard"
 ],
 "aliases": [
  "gu10 pin spacing",
  "gu5.3 pin spacing",
  "mr16 base dimensions",
  "gu10 socket dimensions"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/lamp-base-gu10-gu5-3/",
 "sheet_txt": "https://xemstudio.com/objects/lamp-base-gu10-gu5-3/sheet.txt",
 "sheet": {
  "basis": "Wikipedia Bi-pin lamp base table; numbers only",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "GU5.3 (MR16) pins are 5.33 mm apart, pin diameter 1.45 to 1.6 mm. GU10 pins are 10 mm apart (twist-lock).",
   "No file: pin length, GU10 pin head size and the base outline are not published on a page available to Xem, and a pair of holes alone would not be a base. The GU10 pin diameter in the source table is ambiguous, so it is left out."
  ],
  "table": {
   "columns": [
    "base",
    "pin spacing",
    "pin diameter"
   ],
   "rows": [
    [
     "GU5.3 / G5.3 (MR16)",
     "5.33 mm",
     "1.45 to 1.6 mm (G5.3: 1.47 to 1.65 mm)"
    ],
    [
     "GU10",
     "10 mm",
     "not confirmed"
    ]
   ]
  }
 },
 "sheet_text": "GU10 and GU5.3 (MR16) bi-pin lamp bases: pin spacing — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/lamp-base-gu10-gu5-3/  (sheet CC BY 4.0)\nBasis: Wikipedia Bi-pin lamp base table; numbers only\nCatalog version: 2026-10-20\n\nSizes: see table below\n- GU5.3 (MR16) pins are 5.33 mm apart, pin diameter 1.45 to 1.6 mm. GU10 pins are 10 mm apart (twist-lock).\n- No file: pin length, GU10 pin head size and the base outline are not published on a page available to Xem, and a pair of holes alone would not be a base. The GU10 pin diameter in the source table is ambiguous, so it is left out.\n\nbase  pin spacing  pin diameter\nGU5.3 / G5.3 (MR16)  5.33 mm  1.45 to 1.6 mm (G5.3: 1.47 to 1.65 mm)\nGU10  10 mm  not confirmed\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Bi-pin lamp base — web — CC BY-SA; facts only — https://en.wikipedia.org/wiki/Bi-pin_lamp_base\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=lamp-base-gu10-gu5-3\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Bi-pin lamp base",
   "url": "https://en.wikipedia.org/wiki/Bi-pin_lamp_base",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA; facts only",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "a19-light-bulb",
  "a21-light-bulb",
  "br30-light-bulb",
  "br40-light-bulb",
  "par30l-light-bulb",
  "par38-light-bulb",
  "g25-light-bulb",
  "mr16-light-bulb",
  "gu10-par16-light-bulb",
  "lamp-base-edison-screw"
 ],
 "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 far apart are GU10 pins?",
   "a": "10 mm."
  },
  {
   "q": "How far apart are MR16 GU5.3 pins?",
   "a": "5.33 mm."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/lamp-base-gu10-gu5-3/index.md"
}