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Tri-clamp dial thermometers (envelope): 3 and 5 in dial, ¼ in stem 2½ to 12 in, 1½ in clamp
How long a stem does a tri-clamp thermometer need? · Hardware · basis: Envelope drawn by Xem Studio: the standard 1–1½ in solid cap, a ¼ in (6.35) stem, a 12 × 20 neck and a back-connected case at the nominal dial size + 6 mm; check a real thermometer's case before designing tight around it
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 10 in table
Notes
- Sanitary dial thermometers with a clamp face: a space model for planning a lid or a stand around one, or a dummy to print. Stem length is from the clamp face to the tip.
- 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.
Sizes
| dial_in | stem_in | stem_mm | stem_od_mm | case_od_mm |
|---|---|---|---|---|
| 3 | 2.5 | 63.5 | 6.35 | 82.2 |
| 3 | 4 | 101.6 | 6.35 | 82.2 |
| 3 | 6 | 152.4 | 6.35 | 82.2 |
| 3 | 9 | 228.6 | 6.35 | 82.2 |
| 3 | 12 | 304.8 | 6.35 | 82.2 |
| 5 | 2.5 | 63.5 | 6.35 | 133.0 |
| 5 | 4 | 101.6 | 6.35 | 133.0 |
| 5 | 6 | 152.4 | 6.35 | 133.0 |
| 5 | 9 | 228.6 | 6.35 | 133.0 |
| 5 | 12 | 304.8 | 6.35 | 133.0 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| 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 |
| 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) | maker chart; dimensions are facts verify |
Free files
★ Free files 10 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| dial-thermometer-3in-1.5in-clamp-2.5in | 3 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 2.5 in below the face, case Ø82.2, top 56.4 above the face | STEP · STL |
| dial-thermometer-3in-1.5in-clamp-4in | 3 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 4 in below the face, case Ø82.2, top 56.4 above the face | STEP · STL |
| dial-thermometer-3in-1.5in-clamp-6in | 3 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 6 in below the face, case Ø82.2, top 56.4 above the face | STEP · STL |
| dial-thermometer-3in-1.5in-clamp-9in | 3 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 9 in below the face, case Ø82.2, top 56.4 above the face | STEP · STL |
| dial-thermometer-3in-1.5in-clamp-12in | 3 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 12 in below the face, case Ø82.2, top 56.4 above the face | STEP · STL |
| dial-thermometer-5in-1.5in-clamp-2.5in | 5 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 2.5 in below the face, case Ø133.0, top 62.4 above the face | STEP · STL |
| dial-thermometer-5in-1.5in-clamp-4in | 5 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 4 in below the face, case Ø133.0, top 62.4 above the face | STEP · STL |
| dial-thermometer-5in-1.5in-clamp-6in | 5 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 6 in below the face, case Ø133.0, top 62.4 above the face | STEP · STL |
| dial-thermometer-5in-1.5in-clamp-9in | 5 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 9 in below the face, case Ø133.0, top 62.4 above the face | STEP · STL |
| dial-thermometer-5in-1.5in-clamp-12in | 5 in dial thermometer envelope on a 1–1½ in clamp: ¼ in stem 12 in below the face, case Ø133.0, top 62.4 above the face | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-dial-thermometers

Fits with
Questions
Thermometer or thermowell?
A thermometer with a clamp face touches the liquid; a thermowell keeps any ¼ in stem dry and lets you swap probes without opening the vessel.

