{
 "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": "lead-screw-t8",
 "name": "T8 lead screw and brass nut (Tr8×8, 2 mm pitch 4-start)",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are the T8 lead screw nut flange dimensions?",
 "tags": [
  "lead screw",
  "leadscrew",
  "motion",
  "z axis"
 ],
 "aliases": [
  "t8 lead screw",
  "tr8x8",
  "leadscrew nut",
  "t8 nut",
  "trapezoidal screw"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 7,
 "url": "https://xemstudio.com/objects/lead-screw-t8/",
 "sheet_txt": "https://xemstudio.com/objects/lead-screw-t8/sheet.txt",
 "sheet": {
  "basis": "Tr8×8(P2) trapezoidal lead screw as sold for 3D printers; nut dimensions from common catalogues",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Ø8 mm screw, 2 mm pitch, 4 starts → 8 mm lead (one turn = 8 mm). Tr8×2 single-start (2 mm lead) exists and looks identical; check the spec.",
   "Brass nut: Ø10.2 body, 15 mm long, Ø22 flange 3.5 mm thick, four Ø3.5 holes on a 16 mm circle (M3). Print the pocket for the flange at Ø22.3.",
   "Couple to a NEMA 17 with a 5 → 8 mm coupler, or buy the screw with an integrated motor."
  ],
  "table": {
   "columns": [
    "part",
    "dia_mm",
    "length_mm",
    "detail"
   ],
   "rows": [
    [
     "screw",
     8,
     "100–400",
     "Tr8×8(P2), 4-start"
    ],
    [
     "nut body",
     10.2,
     15,
     "brass, Tr8×8"
    ],
    [
     "nut flange",
     22,
     3.5,
     "4 × Ø3.5 on 16 PCD"
    ]
   ]
  }
 },
 "sheet_text": "T8 lead screw and brass nut (Tr8×8, 2 mm pitch 4-start) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/lead-screw-t8/  (CC BY 4.0)\nBasis: Tr8×8(P2) trapezoidal lead screw as sold for 3D printers; nut dimensions from common catalogues\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Ø8 mm screw, 2 mm pitch, 4 starts → 8 mm lead (one turn = 8 mm). Tr8×2 single-start (2 mm lead) exists and looks identical; check the spec.\n- Brass nut: Ø10.2 body, 15 mm long, Ø22 flange 3.5 mm thick, four Ø3.5 holes on a 16 mm circle (M3). Print the pocket for the flange at Ø22.3.\n- Couple to a NEMA 17 with a 5 → 8 mm coupler, or buy the screw with an integrated motor.\n\npart  dia_mm  length_mm  detail\nscrew  8  100–400  Tr8×8(P2), 4-start\nnut body  10.2  15  brass, Tr8×8\nnut flange  22  3.5  4 × Ø3.5 on 16 PCD\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Leadscrew — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Leadscrew\n- McMaster-Carr: Lead screws and nuts (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/lead-screws/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 7 parts): https://xemstudio.com/files/hardware/lead-screw-t8/index.json\nAPI: https://xemstudio.com/api/geometry?object=lead-screw-t8\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Leadscrew",
   "url": "https://en.wikipedia.org/wiki/Leadscrew",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Lead screws and nuts (free STEP/IGES/STL per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/lead-screws/",
   "formats": [
    "STEP",
    "IGES",
    "STL",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "nema-17-stepper",
  "shaft-couplers",
  "ball-bearings-metric",
  "mgn-linear-rails",
  "lm8uu-linear-bearing"
 ],
 "faq": [
  {
   "q": "What is the T8 nut hole pattern?",
   "a": "Four Ø3.5 mm holes (M3) on a 16 mm pitch circle, at 45° to the axes; flange Ø22 × 3.5 mm."
  },
  {
   "q": "Is T8 lead 2 mm or 8 mm?",
   "a": "Both are sold as 'T8'. Tr8×8 (4-start) moves 8 mm per turn; Tr8×2 moves 2 mm. Count the starts on the end of the screw: four visible thread ends = 8 mm lead."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "t8-screw-100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-100.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-100.stl",
   "note": "T8 lead screw envelope Ø8 × 100 (thread not modeled)"
  },
  {
   "file": "t8-screw-150",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-150.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-150.stl",
   "note": "T8 lead screw envelope Ø8 × 150 (thread not modeled)"
  },
  {
   "file": "t8-screw-200",
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-200.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-200.stl",
   "note": "T8 lead screw envelope Ø8 × 200 (thread not modeled)"
  },
  {
   "file": "t8-screw-250",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-250.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-250.stl",
   "note": "T8 lead screw envelope Ø8 × 250 (thread not modeled)"
  },
  {
   "file": "t8-screw-300",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-300.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-300.stl",
   "note": "T8 lead screw envelope Ø8 × 300 (thread not modeled)"
  },
  {
   "file": "t8-screw-400",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-400.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-screw-400.stl",
   "note": "T8 lead screw envelope Ø8 × 400 (thread not modeled)"
  },
  {
   "file": "t8-brass-nut",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-brass-nut.step",
   "stl": "https://xemstudio.com/files/hardware/lead-screw-t8/t8-brass-nut.stl",
   "note": "T8 brass nut: Ø10.2 body, Ø22 flange 3.5 thick, 4 × Ø3.5 on 16 PCD, 15 long"
  }
 ],
 "markdown": "https://xemstudio.com/objects/lead-screw-t8/index.md"
}