{
 "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": "trailer-hitch-receiver-3-inch",
 "name": "Trailer hitch receiver, 3 in square (SAE J684 classes)",
 "kind": "modern",
 "category": "Tools & garage",
 "group": "Hitch receivers",
 "year": null,
 "question": "What are the dimensions of the Trailer hitch receiver, 3 in square?",
 "tags": [
  "hitch receivers"
 ],
 "aliases": [
  "3 inch hitch receiver",
  "3 receiver dimensions",
  "3 hitch pin size",
  "3 receiver insert",
  "3 hitch cover 3d print",
  "3 hitch receiver size mm",
  "hitch class chart",
  "sae j684 receiver",
  "hitch receiver sizes",
  "receptor enganche 3 pulgadas",
  "Anhängerkupplung Aufnahme 3 Zoll"
 ],
 "overall_mm": {
  "length": 76.2,
  "width": 76.2,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/trailer-hitch-receiver-3-inch/",
 "sheet_txt": "https://xemstudio.com/objects/trailer-hitch-receiver-3-inch/sheet.txt",
 "sheet": {
  "basis": "Manufacturer specifications (Lippert (CURT))",
  "overall_mm": {
   "length": 76.2,
   "width": 76.2,
   "height": null
  },
  "notes": [
   "A 3 in receiver takes a 3 in square shank and a 5/8 in hitch pin, per CURT/Lippert's class and pin guides.",
   "Rated weights depend on the specific hitch; the class figures are the maker's typical ranges.",
   "No CAD file: the maker publishes only overall sizes, and a plain box or cylinder is not useful design geometry. The table is the published data; parts with real geometry have their own pages."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "Receiver size",
     "3 × 3 in (76.2 mm square)"
    ],
    [
     "Hitch classes",
     "Class 5+ (3 in)"
    ],
    [
     "Hitch pin diameter",
     "5/8 in (15.88 mm)"
    ],
    [
     "Minimum usable pin length (excl. handle)",
     "4-7/8 in (123.82 mm)"
    ]
   ]
  }
 },
 "sheet_text": "Trailer hitch receiver, 3 in square (SAE J684 classes) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/trailer-hitch-receiver-3-inch/  (sheet CC BY 4.0)\nBasis: Manufacturer specifications (Lippert (CURT))\nCatalog version: 2026-10-20\n\nOverall (mm): length 76.2, width 76.2\n- A 3 in receiver takes a 3 in square shank and a 5/8 in hitch pin, per CURT/Lippert's class and pin guides.\n- Rated weights depend on the specific hitch; the class figures are the maker's typical ranges.\n- No CAD file: the maker publishes only overall sizes, and a plain box or cylinder is not useful design geometry. The table is the published data; parts with real geometry have their own pages.\n\ndimension  value\nReceiver size  3 × 3 in (76.2 mm square)\nHitch classes  Class 5+ (3 in)\nHitch pin diameter  5/8 in (15.88 mm)\nMinimum usable pin length (excl. handle)  4-7/8 in (123.82 mm)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Lippert (CURT): A Beginner's Guide to Hitch Classes — web — Publisher's page; dimensions are facts — https://www.lippert.com/blog/a-beginners-guide-to-hitch-classes\n- Lippert (CURT): Guide to Hitch Pin Sizes — web — Publisher's page; dimensions are facts — https://www.lippert.com/blog/guide-to-hitch-pin-sizes\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=trailer-hitch-receiver-3-inch\n",
 "sources": [
  {
   "publisher": "Lippert (CURT)",
   "title": "A Beginner's Guide to Hitch Classes",
   "url": "https://www.lippert.com/blog/a-beginners-guide-to-hitch-classes",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Lippert (CURT)",
   "title": "Guide to Hitch Pin Sizes",
   "url": "https://www.lippert.com/blog/guide-to-hitch-pin-sizes",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "trailer-hitch-receiver-1-1-4-inch",
  "trailer-hitch-receiver-2-inch",
  "trailer-hitch-receiver-2-1-2-inch"
 ],
 "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": "What pin fits a 3 in receiver?",
   "a": "A 5/8 in (15.88 mm) pin with at least 4-7/8 in usable length."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/trailer-hitch-receiver-3-inch/index.md"
}