{
 "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": "tri-clamp-thermowells",
 "name": "Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Sanitary clamp fittings",
 "year": null,
 "question": "What thermowell fits a 1½ inch tri-clamp port?",
 "tags": [
  "thermowell",
  "temperature",
  "thermometer",
  "probe",
  "sanitary",
  "tri-clamp",
  "clamp fitting",
  "brewing",
  "homebrew"
 ],
 "aliases": [
  "tri clamp thermowell",
  "1.5 tri clamp thermowell",
  "thermowell for fermenter",
  "tri clamp temperature probe",
  "homebrew thermowell"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 10,
 "url": "https://xemstudio.com/objects/tri-clamp-thermowells/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-thermowells/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design: the standard solid cap with a ⅜ in (9.53) well closed by a round tip, a Ø6.6 bore for a ¼ in (6.35) thermometer or probe stem, and a ½ NPT Class 3000 half coupling on top (tap-drill bore)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "The temperature stick: clamp it into a port and slide a ¼ in stem thermometer or probe into the well, so the probe never touches the liquid. Insertion is measured from the clamp face to the tip.",
   "Pick the length so the tip sits in the middle of the liquid: in a 6 in × 18 in vessel through the top, 12 in; through a side port, 2½ to 4 in.",
   "Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40."
  ],
  "table": {
   "columns": [
    "clamp",
    "insertion_in",
    "insertion_mm",
    "well_od_mm",
    "bore_mm"
   ],
   "rows": [
    [
     "1–1½",
     2.5,
     63.5,
     9.53,
     6.6
    ],
    [
     "1–1½",
     4,
     101.6,
     9.53,
     6.6
    ],
    [
     "1–1½",
     6,
     152.4,
     9.53,
     6.6
    ],
    [
     "1–1½",
     9,
     228.6,
     9.53,
     6.6
    ],
    [
     "1–1½",
     12,
     304.8,
     9.53,
     6.6
    ],
    [
     "2",
     2.5,
     63.5,
     9.53,
     6.6
    ],
    [
     "2",
     4,
     101.6,
     9.53,
     6.6
    ],
    [
     "2",
     6,
     152.4,
     9.53,
     6.6
    ],
    [
     "2",
     9,
     228.6,
     9.53,
     6.6
    ],
    [
     "2",
     12,
     304.8,
     9.53,
     6.6
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-thermowells/  (CC BY 4.0)\nBasis: Xem Studio design: the standard solid cap with a ⅜ in (9.53) well closed by a round tip, a Ø6.6 bore for a ¼ in (6.35) thermometer or probe stem, and a ½ NPT Class 3000 half coupling on top (tap-drill bore)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- The temperature stick: clamp it into a port and slide a ¼ in stem thermometer or probe into the well, so the probe never touches the liquid. Insertion is measured from the clamp face to the tip.\n- Pick the length so the tip sits in the middle of the liquid: in a 6 in × 18 in vessel through the top, 12 in; through a side port, 2½ to 4 in.\n- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.\n\nclamp  insertion_in  insertion_mm  well_od_mm  bore_mm\n1–1½  2.5  63.5  9.53  6.6\n1–1½  4  101.6  9.53  6.6\n1–1½  6  152.4  9.53  6.6\n1–1½  9  228.6  9.53  6.6\n1–1½  12  304.8  9.53  6.6\n2  2.5  63.5  9.53  6.6\n2  4  101.6  9.53  6.6\n2  6  152.4  9.53  6.6\n2  9  228.6  9.53  6.6\n2  12  304.8  9.53  6.6\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ASME: B1.20.1 Pipe threads, general purpose (NPT): major diameter, L2, tap drill; B16.11 forged fittings (Class 3000 couplings); B36.10 Sch 40 bore — standard — ASME; dimensions are facts [verify license at link] — https://www.asme.org/codes-standards/find-codes-standards/b1-20-1-pipe-threads-general-purpose-inch\n- GW Kent: Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness — web — publisher's guide; dimensions cited — https://www.gwkent.com/triclamp-guide\n- Rubber Fab: Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/tri-clamp-thermowells/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-thermowells\n",
 "sources": [
  {
   "publisher": "ASME",
   "title": "B1.20.1 Pipe threads, general purpose (NPT): major diameter, L2, tap drill; B16.11 forged fittings (Class 3000 couplings); B36.10 Sch 40 bore",
   "url": "https://www.asme.org/codes-standards/find-codes-standards/b1-20-1-pipe-threads-general-purpose-inch",
   "formats": [
    "standard"
   ],
   "license": "ASME; dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "GW Kent",
   "title": "Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness",
   "url": "https://www.gwkent.com/triclamp-guide",
   "formats": [
    "web"
   ],
   "license": "publisher's guide; dimensions cited",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "maker chart; 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": [
  "tri-clamp-dial-thermometers",
  "tri-clamp-ported-end-caps",
  "tri-clamp-dome-lids",
  "tri-clamp-dished-bottom-vessels"
 ],
 "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 fits in it?",
   "a": "Any ¼ in (6.35 mm) stem: a bimetal dial thermometer, a thermocouple or an RTD probe."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "thermowell-1.5in-2.5in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-2.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-2.5in.stl",
   "note": "1–1½ in clamp thermowell, 2.5 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-1.5in-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-4in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-4in.stl",
   "note": "1–1½ in clamp thermowell, 4 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-1.5in-6in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-6in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-6in.stl",
   "note": "1–1½ in clamp thermowell, 6 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-1.5in-9in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-9in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-9in.stl",
   "note": "1–1½ in clamp thermowell, 9 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-1.5in-12in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-12in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-1.5in-12in.stl",
   "note": "1–1½ in clamp thermowell, 12 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-2in-2.5in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-2.5in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-2.5in.stl",
   "note": "2 in clamp thermowell, 2.5 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-2in-4in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-4in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-4in.stl",
   "note": "2 in clamp thermowell, 4 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-2in-6in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-6in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-6in.stl",
   "note": "2 in clamp thermowell, 6 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-2in-9in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-9in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-9in.stl",
   "note": "2 in clamp thermowell, 9 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  },
  {
   "file": "thermowell-2in-12in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-12in.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-thermowells/thermowell-2in-12in.stl",
   "note": "2 in clamp thermowell, 12 in insertion below the face: Ø9.53 well, Ø6.6 bore for a ¼ in stem, ½ FNPT on top"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-thermowells/index.md"
}