{
 "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": "clevises",
 "name": "Clevises with M3 tapped shank: Ø3, Ø5 and Ø6 pins, 5 to 12 mm gaps",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are the dimensions of a small clevis fork for a pushrod?",
 "tags": [
  "clevis",
  "fork",
  "pushrod",
  "linkage",
  "pivot",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "clevis 3d model",
  "m3 clevis dimensions",
  "rc clevis stl",
  "clevis fork 5mm gap",
  "pushrod clevis"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 5,
 "url": "https://xemstudio.com/objects/clevises/",
 "sheet_txt": "https://xemstudio.com/objects/clevises/sheet.txt",
 "sheet": {
  "basis": "Fork with a cross pin hole at the pin Ø and a gap equal to the link thickness; Ø8 shank boss tapped M3 (Ø2.5 tap drill)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A fork 18 long × 12 tall with two 4 mm tines; the gap between the tines is the link thickness and the cross hole is the pin Ø, 6 mm in from the open end at mid-height.",
   "A Ø8 × 10 shank boss on the closed end carries a Ø2.5 hole 10 deep, the M3 tap drill, for a threaded pushrod. Every file is 28 long overall.",
   "Sizes: Ø3 pin with a 5 or 8 mm gap; Ø5 pin with 8 or 10; Ø6 pin with 12. Width across the tines is gap + 8 (13, 16, 16, 18, 20)."
  ],
  "table": {
   "columns": [
    "file",
    "pin hole Ø",
    "gap",
    "width",
    "length",
    "height",
    "shank"
   ],
   "rows": [
    [
     "clevis-3-gap5",
     3,
     5,
     13,
     28,
     12,
     "Ø8, M3 tap Ø2.5 × 10"
    ],
    [
     "clevis-3-gap8",
     3,
     8,
     16,
     28,
     12,
     "Ø8, M3 tap Ø2.5 × 10"
    ],
    [
     "clevis-5-gap8",
     5,
     8,
     16,
     28,
     12,
     "Ø8, M3 tap Ø2.5 × 10"
    ],
    [
     "clevis-5-gap10",
     5,
     10,
     18,
     28,
     12,
     "Ø8, M3 tap Ø2.5 × 10"
    ],
    [
     "clevis-6-gap12",
     6,
     12,
     20,
     28,
     12,
     "Ø8, M3 tap Ø2.5 × 10"
    ]
   ]
  }
 },
 "sheet_text": "Clevises with M3 tapped shank: Ø3, Ø5 and Ø6 pins, 5 to 12 mm gaps — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/clevises/  (CC BY 4.0)\nBasis: Fork with a cross pin hole at the pin Ø and a gap equal to the link thickness; Ø8 shank boss tapped M3 (Ø2.5 tap drill)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A fork 18 long × 12 tall with two 4 mm tines; the gap between the tines is the link thickness and the cross hole is the pin Ø, 6 mm in from the open end at mid-height.\n- A Ø8 × 10 shank boss on the closed end carries a Ø2.5 hole 10 deep, the M3 tap drill, for a threaded pushrod. Every file is 28 long overall.\n- Sizes: Ø3 pin with a 5 or 8 mm gap; Ø5 pin with 8 or 10; Ø6 pin with 12. Width across the tines is gap + 8 (13, 16, 16, 18, 20).\n\nfile  pin hole Ø  gap  width  length  height  shank\nclevis-3-gap5  3  5  13  28  12  Ø8, M3 tap Ø2.5 × 10\nclevis-3-gap8  3  8  16  28  12  Ø8, M3 tap Ø2.5 × 10\nclevis-5-gap8  5  8  16  28  12  Ø8, M3 tap Ø2.5 × 10\nclevis-5-gap10  5  10  18  28  12  Ø8, M3 tap Ø2.5 × 10\nclevis-6-gap12  6  12  20  28  12  Ø8, M3 tap Ø2.5 × 10\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Clevis fastener — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Clevis_fastener\n- Wikipedia: Universal joint — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Universal_joint\n- Wikipedia: Rod end bearing — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Rod_end_bearing\n- McMaster-Carr: Clevis pins (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/clevis-pins/\n- McMaster-Carr: Rod ends (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/ball-joint-rod-ends/\n- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/clevises/index.json\nAPI: https://xemstudio.com/api/geometry?object=clevises\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Clevis fastener",
   "url": "https://en.wikipedia.org/wiki/Clevis_fastener",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Universal joint",
   "url": "https://en.wikipedia.org/wiki/Universal_joint",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Rod end bearing",
   "url": "https://en.wikipedia.org/wiki/Rod_end_bearing",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Clevis pins (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/clevis-pins/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Rod ends (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/ball-joint-rod-ends/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine and rig builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "clevis-pins",
  "r-clips",
  "rod-ends-heim-joints",
  "four-bar-links",
  "bell-cranks"
 ],
 "fits": [
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "clevis-pins",
     "why": "Ø3 / Ø5 / Ø6 pin across the fork"
    },
    {
     "slug": "four-bar-links",
     "why": "link of the gap's thickness between the tines"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "rod-ends-heim-joints",
     "why": "ball joint on a threaded shank"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "r-clips",
     "why": "retains the pin"
    }
   ]
  }
 ],
 "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": [
  {
   "feature": "pin hole",
   "exact": "Ø3 / Ø5 / Ø6",
   "mates": "clevis pin (turns in it)",
   "fit": "run",
   "files": "clevis-"
  },
  {
   "feature": "fork gap",
   "exact": "5 / 8 / 10 / 12",
   "mates": "link of that thickness",
   "fit": "run",
   "files": "clevis-"
  },
  {
   "feature": "shank thread hole",
   "exact": "Ø2.5",
   "mates": "M3 tap drill (pushrod)",
   "fit": "designed",
   "files": "clevis-"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What clevis fits a 5 mm thick link?",
   "a": "clevis-3-gap5: 5 mm gap, Ø3 pin hole, 13 × 28 × 12 overall."
  },
  {
   "q": "What thread is the clevis shank?",
   "a": "M3: a Ø2.5 tap-drill hole 10 deep in a Ø8 boss."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "clevis-3-gap5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-3-gap5.step",
   "stl": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-3-gap5.stl",
   "note": "clevis for a Ø3 pin (Ø3 hole), 5 mm gap for a 5 mm link, M3 tapped shank (Ø2.5)"
  },
  {
   "file": "clevis-3-gap8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-3-gap8.step",
   "stl": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-3-gap8.stl",
   "note": "clevis for a Ø3 pin (Ø3 hole), 8 mm gap for a 8 mm link, M3 tapped shank (Ø2.5)"
  },
  {
   "file": "clevis-5-gap8",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-5-gap8.step",
   "stl": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-5-gap8.stl",
   "note": "clevis for a Ø5 pin (Ø5 hole), 8 mm gap for a 8 mm link, M3 tapped shank (Ø2.5)"
  },
  {
   "file": "clevis-5-gap10",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-5-gap10.step",
   "stl": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-5-gap10.stl",
   "note": "clevis for a Ø5 pin (Ø5 hole), 10 mm gap for a 10 mm link, M3 tapped shank (Ø2.5)"
  },
  {
   "file": "clevis-6-gap12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-6-gap12.step",
   "stl": "https://xemstudio.com/files/hardware/pins-clevises-and-joints/clevis-6-gap12.stl",
   "note": "clevis for a Ø6 pin (Ø6 hole), 12 mm gap for a 12 mm link, M3 tapped shank (Ø2.5)"
  }
 ],
 "markdown": "https://xemstudio.com/objects/clevises/index.md"
}