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Tri-clamp probe gland caps: Ø4, Ø6 and ¼ in probes, 1 to 3 per cap
How do I put a 6 mm temperature probe through a tri-clamp lid? · Hardware · basis: Xem Studio design on the standard solid cap: a boss bored to the probe diameter with two internal grooves for a probe-size × 1.5 O-ring
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 18 in table
Notes
- Slide a stainless probe (the common 6 × 50 mm DS18B20 temperature probe, a Ø4 thermocouple or a ¼ in RTD) down through the lid; two O-rings seal it and let you set the depth.
- 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
| clamp | probe_mm | ports | o_ring |
|---|---|---|---|
| 1–1½ | 4.0 | 1 | 4 × 1.5 |
| 1–1½ | 4.0 | 2 | 4 × 1.5 |
| 1–1½ | 4.0 | 3 | 4 × 1.5 |
| 1–1½ | 6.0 | 1 | 6 × 1.5 |
| 1–1½ | 6.0 | 2 | 6 × 1.5 |
| 1–1½ | 6.0 | 3 | 6 × 1.5 |
| 1–1½ | 6.35 | 1 | 6.35 × 1.5 |
| 1–1½ | 6.35 | 2 | 6.35 × 1.5 |
| 1–1½ | 6.35 | 3 | 6.35 × 1.5 |
| 2 | 4.0 | 1 | 4 × 1.5 |
| 2 | 4.0 | 2 | 4 × 1.5 |
| 2 | 4.0 | 3 | 4 × 1.5 |
| 2 | 6.0 | 1 | 6 × 1.5 |
| 2 | 6.0 | 2 | 6 × 1.5 |
| 2 | 6.0 | 3 | 6 × 1.5 |
| 2 | 6.35 | 1 | 6.35 × 1.5 |
| 2 | 6.35 | 2 | 6.35 × 1.5 |
| 2 | 6.35 | 3 | 6.35 × 1.5 |
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 18 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| gland-cap-1.5in-4mm-x1 | 1–1½ in cap with 1 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-1.5in-4mm-x2 | 1–1½ in cap with 2 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-1.5in-4mm-x3 | 1–1½ in cap with 3 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-1.5in-6mm-x1 | 1–1½ in cap with 1 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-1.5in-6mm-x2 | 1–1½ in cap with 2 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-1.5in-6mm-x3 | 1–1½ in cap with 3 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-1.5in-6.35mm-x1 | 1–1½ in cap with 1 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
| gland-cap-1.5in-6.35mm-x2 | 1–1½ in cap with 2 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
| gland-cap-1.5in-6.35mm-x3 | 1–1½ in cap with 3 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
| gland-cap-2in-4mm-x1 | 2 in cap with 1 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-2in-4mm-x2 | 2 in cap with 2 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-2in-4mm-x3 | 2 in cap with 3 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 | STEP · STL |
| gland-cap-2in-6mm-x1 | 2 in cap with 1 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-2in-6mm-x2 | 2 in cap with 2 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-2in-6mm-x3 | 2 in cap with 3 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 | STEP · STL |
| gland-cap-2in-6.35mm-x1 | 2 in cap with 1 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
| gland-cap-2in-6.35mm-x2 | 2 in cap with 2 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
| gland-cap-2in-6.35mm-x3 | 2 in cap with 3 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=tri-clamp-probe-gland-caps

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Questions
Which O-ring?
One the size of the probe with a 1.5 mm section (6 × 1.5 for a 6 mm probe), two per port.