{
 "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-inch",
 "name": "Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2)",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What size is a 5/16-18 nut?",
 "tags": [
  "nut",
  "hex nut",
  "inch"
 ],
 "aliases": [
  "5/16 nut dimensions",
  "1/4-20 nut size",
  "inch hex nut step"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 12,
 "url": "https://xemstudio.com/objects/hex-nuts-inch/",
 "sheet_txt": "https://xemstudio.com/objects/hex-nuts-inch/sheet.txt",
 "sheet": {
  "basis": "ASME B18.2.2 finished hex nuts and machine screw nuts: width across flats F, thickness H",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Threads are plain cylinders at the major diameter, as every thread on this site. The bore is the major diameter."
  ],
  "table": {
   "columns": [
    "thread",
    "af_in",
    "thickness_in"
   ],
   "rows": [
    [
     "1/4-20",
     0.4375,
     0.2188
    ],
    [
     "5/16-18",
     0.5,
     0.2656
    ],
    [
     "3/8-16",
     0.5625,
     0.3281
    ],
    [
     "7/16-14",
     0.6875,
     0.375
    ],
    [
     "1/2-13",
     0.75,
     0.4375
    ],
    [
     "5/8-11",
     0.9375,
     0.5469
    ],
    [
     "3/4-10",
     1.125,
     0.6406
    ],
    [
     "#4-40",
     0.25,
     0.0938
    ],
    [
     "#6-32",
     0.3125,
     0.1094
    ],
    [
     "#8-32",
     0.3438,
     0.125
    ],
    [
     "#10-24",
     0.375,
     0.125
    ],
    [
     "#10-32",
     0.375,
     0.125
    ]
   ]
  }
 },
 "sheet_text": "Hex nuts, inch: #4-40 to 3/4-10 (ASME B18.2.2) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/hex-nuts-inch/  (CC BY 4.0)\nBasis: ASME B18.2.2 finished hex nuts and machine screw nuts: width across flats F, thickness H\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Threads are plain cylinders at the major diameter, as every thread on this site. The bore is the major diameter.\n\nthread  af_in  thickness_in\n1/4-20  0.4375  0.2188\n5/16-18  0.5  0.2656\n3/8-16  0.5625  0.3281\n7/16-14  0.6875  0.375\n1/2-13  0.75  0.4375\n5/8-11  0.9375  0.5469\n3/4-10  1.125  0.6406\n#4-40  0.25  0.0938\n#6-32  0.3125  0.1094\n#8-32  0.3438  0.125\n#10-24  0.375  0.125\n#10-32  0.375  0.125\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ASME: ASME B18.2.2 Nuts for general applications (inch) — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/b18-2-2-nuts-for-general-applications-machine-screw-nuts-hex-square-hex-flange-coupling-nuts-(inch-series)\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 12 parts): https://xemstudio.com/files/hardware/hex-nuts-inch/index.json\nAPI: https://xemstudio.com/api/geometry?object=hex-nuts-inch\n",
 "sources": [
  {
   "publisher": "ASME",
   "title": "ASME B18.2.2 Nuts for general applications (inch)",
   "url": "https://www.asme.org/codes-standards/find-codes-standards/b18-2-2-nuts-for-general-applications-machine-screw-nuts-hex-square-hex-flange-coupling-nuts-(inch-series)",
   "formats": [
    "standard"
   ],
   "license": "ASME; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "hex-bolts-inch",
  "flat-washers-inch",
  "socket-head-cap-screws-inch",
  "button-head-socket-screws-inch",
  "imperial-machine-screws"
 ],
 "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": "5/16-18 nut?",
   "a": "1/2 in AF, 17/64 in thick."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "nut-1-4-20",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-1-4-20.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-1-4-20.stl",
   "note": "1/4-20 finished hex nut: 0.4375 in AF × 0.2188 in"
  },
  {
   "file": "nut-5-16-18",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-5-16-18.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-5-16-18.stl",
   "note": "5/16-18 finished hex nut: 0.5 in AF × 0.2656 in"
  },
  {
   "file": "nut-3-8-16",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-3-8-16.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-3-8-16.stl",
   "note": "3/8-16 finished hex nut: 0.5625 in AF × 0.3281 in"
  },
  {
   "file": "nut-7-16-14",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-7-16-14.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-7-16-14.stl",
   "note": "7/16-14 finished hex nut: 0.6875 in AF × 0.375 in"
  },
  {
   "file": "nut-1-2-13",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-1-2-13.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-1-2-13.stl",
   "note": "1/2-13 finished hex nut: 0.75 in AF × 0.4375 in"
  },
  {
   "file": "nut-5-8-11",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-5-8-11.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-5-8-11.stl",
   "note": "5/8-11 finished hex nut: 0.9375 in AF × 0.5469 in"
  },
  {
   "file": "nut-3-4-10",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-3-4-10.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-3-4-10.stl",
   "note": "3/4-10 finished hex nut: 1.125 in AF × 0.6406 in"
  },
  {
   "file": "nut-4-40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-4-40.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-4-40.stl",
   "note": "#4-40 machine screw nut: 0.25 in AF × 0.09375 in"
  },
  {
   "file": "nut-6-32",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-6-32.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-6-32.stl",
   "note": "#6-32 machine screw nut: 0.3125 in AF × 0.1094 in"
  },
  {
   "file": "nut-8-32",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-8-32.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-8-32.stl",
   "note": "#8-32 machine screw nut: 0.3438 in AF × 0.125 in"
  },
  {
   "file": "nut-10-24",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-10-24.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-10-24.stl",
   "note": "#10-24 machine screw nut: 0.375 in AF × 0.125 in"
  },
  {
   "file": "nut-10-32",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-10-32.step",
   "stl": "https://xemstudio.com/files/hardware/hex-nuts-inch/nut-10-32.stl",
   "note": "#10-32 machine screw nut: 0.375 in AF × 0.125 in"
  }
 ],
 "markdown": "https://xemstudio.com/objects/hex-nuts-inch/index.md"
}