{
 "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": "heat-set-inserts-inch",
 "name": "Heat-set threaded inserts, inch: #2-56 to 3/8-16 and G1/8 (CNC Kitchen sizes)",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What hole size does a 1/4-20 heat-set insert need?",
 "tags": [
  "heat set insert",
  "threaded insert",
  "3d printing",
  "brass insert",
  "fastener"
 ],
 "aliases": [
  "1/4-20 heat set insert",
  "#4-40 threaded insert",
  "inch heat set insert dimensions",
  "camera mount insert 1/4-20",
  "g1/8 insert"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 14,
 "url": "https://xemstudio.com/objects/heat-set-inserts-inch/",
 "sheet_txt": "https://xemstudio.com/objects/heat-set-inserts-inch/sheet.txt",
 "sheet": {
  "basis": "CNC Kitchen dimension poster (L, insert Ø D1, hole Ø D2, min wall W, blind hole ≥ L + 1); geometry drawn by Xem Studio from those numbers",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Drawn as: lead-in pilot at the tip Ø over the bottom 15 % of the length, two knurl bands at the insert Ø with a relief groove between, thread as a plain bore at the minor diameter (threads not modelled). Knurl texture is not drawn: the insert Ø is the knurl's outside.",
   "Print the hole at the listed hole Ø, at least the insert length + 1 mm deep for a blind hole (room for displaced plastic), and keep at least W of wall around it. Press the insert in with a soldering iron and insert tip at the plastic's printing temperature until its top is flush."
  ],
  "table": {
   "columns": [
    "thread",
    "variant",
    "length_mm",
    "insert_od_mm",
    "hole_mm",
    "min_hole_depth_mm",
    "min_wall_mm",
    "min_boss_od_mm"
   ],
   "rows": [
    [
     "#2-56",
     "standard",
     3.2,
     3.6,
     3.2,
     4.2,
     1.3,
     5.8
    ],
    [
     "#4-40",
     "standard",
     5.7,
     4.6,
     4,
     6.7,
     1.6,
     7.2
    ],
    [
     "#4-40",
     "short",
     3.6,
     4.6,
     4,
     4.6,
     1.6,
     7.2
    ],
    [
     "#6-32",
     "standard",
     7.1,
     5.4,
     4.8,
     8.1,
     1.8,
     8.4
    ],
    [
     "#6-32",
     "short",
     3.8,
     5.4,
     4.8,
     4.8,
     1.8,
     8.4
    ],
    [
     "#8-32",
     "standard",
     8.2,
     6.3,
     5.7,
     9.2,
     2.1,
     9.9
    ],
    [
     "#8-32",
     "short",
     4.7,
     6.3,
     5.7,
     5.7,
     2.1,
     9.9
    ],
    [
     "#10-24",
     "standard",
     9.5,
     7.1,
     6.5,
     10.5,
     2.6,
     11.7
    ],
    [
     "#10-32",
     "standard",
     9.5,
     7.1,
     6.5,
     10.5,
     2.6,
     11.7
    ],
    [
     "1/4-20",
     "standard",
     12.7,
     8.7,
     8.1,
     13.7,
     3.3,
     14.7
    ],
    [
     "1/4-20",
     "short",
     6.4,
     8.7,
     8.1,
     7.4,
     3.3,
     14.7
    ],
    [
     "5/16-18",
     "standard",
     12.7,
     10.2,
     9.7,
     13.7,
     4.5,
     18.7
    ],
    [
     "3/8-16",
     "standard",
     12.7,
     12.5,
     12,
     13.7,
     6,
     24
    ],
    [
     "G1/8",
     "standard",
     12.7,
     12.5,
     12,
     13.7,
     6,
     24
    ]
   ]
  }
 },
 "sheet_text": "Heat-set threaded inserts, inch: #2-56 to 3/8-16 and G1/8 (CNC Kitchen sizes) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/heat-set-inserts-inch/  (CC BY 4.0)\nBasis: CNC Kitchen dimension poster (L, insert Ø D1, hole Ø D2, min wall W, blind hole ≥ L + 1); geometry drawn by Xem Studio from those numbers\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Drawn as: lead-in pilot at the tip Ø over the bottom 15 % of the length, two knurl bands at the insert Ø with a relief groove between, thread as a plain bore at the minor diameter (threads not modelled). Knurl texture is not drawn: the insert Ø is the knurl's outside.\n- Print the hole at the listed hole Ø, at least the insert length + 1 mm deep for a blind hole (room for displaced plastic), and keep at least W of wall around it. Press the insert in with a soldering iron and insert tip at the plastic's printing temperature until its top is flush.\n\nthread  variant  length_mm  insert_od_mm  hole_mm  min_hole_depth_mm  min_wall_mm  min_boss_od_mm\n#2-56  standard  3.2  3.6  3.2  4.2  1.3  5.8\n#4-40  standard  5.7  4.6  4.0  6.7  1.6  7.2\n#4-40  short  3.6  4.6  4.0  4.6  1.6  7.2\n#6-32  standard  7.1  5.4  4.8  8.1  1.8  8.4\n#6-32  short  3.8  5.4  4.8  4.8  1.8  8.4\n#8-32  standard  8.2  6.3  5.7  9.2  2.1  9.9\n#8-32  short  4.7  6.3  5.7  5.7  2.1  9.9\n#10-24  standard  9.5  7.1  6.5  10.5  2.6  11.7\n#10-32  standard  9.5  7.1  6.5  10.5  2.6  11.7\n1/4-20  standard  12.7  8.7  8.1  13.7  3.3  14.7\n1/4-20  short  6.4  8.7  8.1  7.4  3.3  14.7\n5/16-18  standard  12.7  10.2  9.7  13.7  4.5  18.7\n3/8-16  standard  12.7  12.5  12.0  13.7  6.0  24.0\nG1/8  standard  12.7  12.5  12.0  13.7  6.0  24.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- CNC Kitchen: Threaded insert dimensions and design guidelines poster: L, D1 (insert Ø), D2 (hole Ø), W (min wall); blind hole min. L + 1 mm — PDF — maker's sheet; dimensions cited, nothing copied — https://cdn.shopify.com/s/files/1/0654/4821/4767/files/Poster_Dimensions-Guidlines.pdf?v=1751444185\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 14 parts): https://xemstudio.com/files/hardware/heat-set-inserts-inch/index.json\nAPI: https://xemstudio.com/api/geometry?object=heat-set-inserts-inch\n",
 "sources": [
  {
   "publisher": "CNC Kitchen",
   "title": "Threaded insert dimensions and design guidelines poster: L, D1 (insert Ø), D2 (hole Ø), W (min wall); blind hole min. L + 1 mm",
   "url": "https://cdn.shopify.com/s/files/1/0654/4821/4767/files/Poster_Dimensions-Guidlines.pdf?v=1751444185",
   "formats": [
    "PDF"
   ],
   "license": "maker's sheet; dimensions cited, nothing copied",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "heat-set-inserts-ruthex",
  "heat-set-insert-holes",
  "socket-head-cap-screws-metric",
  "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": "What hole for a 1/4-20 × 12.7 insert?",
   "a": "Ø8.1, at least 13.7 deep, 3.3 wall (boss Ø14.7 or more)."
  },
  {
   "q": "Short or standard?",
   "a": "Standard holds more; short fits thin walls. Both take the same hole Ø."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "insert-2-56x3.2-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-2-56x3.2-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-2-56x3.2-standard.stl",
   "note": "#2-56 × 3.2 standard insert: Ø3.6 knurl, 3.2 long; print hole Ø3.2 × ≥4.2, wall ≥ 1.3"
  },
  {
   "file": "insert-4-40x5.7-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-4-40x5.7-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-4-40x5.7-standard.stl",
   "note": "#4-40 × 5.7 standard insert: Ø4.6 knurl, 5.7 long; print hole Ø4 × ≥6.7, wall ≥ 1.6"
  },
  {
   "file": "insert-4-40x3.6-short",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-4-40x3.6-short.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-4-40x3.6-short.stl",
   "note": "#4-40 × 3.6 short insert: Ø4.6 knurl, 3.6 long; print hole Ø4 × ≥4.6, wall ≥ 1.6"
  },
  {
   "file": "insert-6-32x7.1-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-6-32x7.1-standard.stl",
   "note": "#6-32 × 7.1 standard insert: Ø5.4 knurl, 7.1 long; print hole Ø4.8 × ≥8.1, wall ≥ 1.8"
  },
  {
   "file": "insert-6-32x3.8-short",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-6-32x3.8-short.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-6-32x3.8-short.stl",
   "note": "#6-32 × 3.8 short insert: Ø5.4 knurl, 3.8 long; print hole Ø4.8 × ≥4.8, wall ≥ 1.8"
  },
  {
   "file": "insert-8-32x8.2-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-8-32x8.2-standard.stl",
   "note": "#8-32 × 8.2 standard insert: Ø6.3 knurl, 8.2 long; print hole Ø5.7 × ≥9.2, wall ≥ 2.1"
  },
  {
   "file": "insert-8-32x4.7-short",
   "formats": [
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    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-8-32x4.7-short.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-8-32x4.7-short.stl",
   "note": "#8-32 × 4.7 short insert: Ø6.3 knurl, 4.7 long; print hole Ø5.7 × ≥5.7, wall ≥ 2.1"
  },
  {
   "file": "insert-10-24x9.5-standard",
   "formats": [
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   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-10-24x9.5-standard.stl",
   "note": "#10-24 × 9.5 standard insert: Ø7.1 knurl, 9.5 long; print hole Ø6.5 × ≥10.5, wall ≥ 2.6"
  },
  {
   "file": "insert-10-32x9.5-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-10-32x9.5-standard.stl",
   "note": "#10-32 × 9.5 standard insert: Ø7.1 knurl, 9.5 long; print hole Ø6.5 × ≥10.5, wall ≥ 2.6"
  },
  {
   "file": "insert-1-4-20x12.7-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-1-4-20x12.7-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-1-4-20x12.7-standard.stl",
   "note": "1/4-20 × 12.7 standard insert: Ø8.7 knurl, 12.7 long; print hole Ø8.1 × ≥13.7, wall ≥ 3.3"
  },
  {
   "file": "insert-1-4-20x6.4-short",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-1-4-20x6.4-short.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-1-4-20x6.4-short.stl",
   "note": "1/4-20 × 6.4 short insert: Ø8.7 knurl, 6.4 long; print hole Ø8.1 × ≥7.4, wall ≥ 3.3"
  },
  {
   "file": "insert-5-16-18x12.7-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-5-16-18x12.7-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-5-16-18x12.7-standard.stl",
   "note": "5/16-18 × 12.7 standard insert: Ø10.2 knurl, 12.7 long; print hole Ø9.7 × ≥13.7, wall ≥ 4.5"
  },
  {
   "file": "insert-3-8-16x12.7-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-3-8-16x12.7-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-3-8-16x12.7-standard.stl",
   "note": "3/8-16 × 12.7 standard insert: Ø12.5 knurl, 12.7 long; print hole Ø12 × ≥13.7, wall ≥ 6"
  },
  {
   "file": "insert-g1-8x12.7-standard",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-g1-8x12.7-standard.step",
   "stl": "https://xemstudio.com/files/hardware/heat-set-inserts-inch/insert-g1-8x12.7-standard.stl",
   "note": "G1/8 × 12.7 standard insert: Ø12.5 knurl, 12.7 long; print hole Ø12 × ≥13.7, wall ≥ 6"
  }
 ],
 "markdown": "https://xemstudio.com/objects/heat-set-inserts-inch/index.md"
}