# Printable tri-clamp (45°): 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 (3D printable)?

- Category: Hardware › Printable tri-clamp
- Kind: Hardware
- Basis: Xem Studio design: 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; printable 45° back cone
- Page: https://xemstudio.com/objects/printable-tri-clamp-probe-gland-caps/ · JSON: https://xemstudio.com/api/geometry?object=printable-tri-clamp-probe-gland-caps · Plain text: https://xemstudio.com/objects/printable-tri-clamp-probe-gland-caps/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- 3D-printable tri-clamp: this is Xem Studio's print-friendly version of the standard sanitary fitting, drawn so it prints on an ordinary FDM or resin printer with no supports. Download the STL to print it, or the STEP to edit it. The files are true size (no printing allowance): add your own clearance in the slicer or CAD if your printer needs it.
- 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.
- Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6.
- Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside.
- 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

- GW Kent: [Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness](https://www.gwkent.com/triclamp-guide) — 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)](https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf) — PDF — maker chart; dimensions are facts (verify at link)

## Free STEP/STL (18 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/index.json

- gland-cap-1.5in-4mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x1-45.stl) — 1–1½ in cap with 1 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-1.5in-4mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x2-45.stl) — 1–1½ in cap with 2 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-1.5in-4mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-4mm-x3-45.stl) — 1–1½ in cap with 3 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-1.5in-6mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x1-45.stl) — 1–1½ in cap with 1 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-1.5in-6mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x2-45.stl) — 1–1½ in cap with 2 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-1.5in-6mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6mm-x3-45.stl) — 1–1½ in cap with 3 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-1.5in-6.35mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x1-45.stl) — 1–1½ in cap with 1 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims
- gland-cap-1.5in-6.35mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x2-45.stl) — 1–1½ in cap with 2 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims
- gland-cap-1.5in-6.35mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-1.5in-6.35mm-x3-45.stl) — 1–1½ in cap with 3 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims
- gland-cap-2in-4mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x1-45.stl) — 2 in cap with 1 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-2in-4mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x2-45.stl) — 2 in cap with 2 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-2in-4mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-4mm-x3-45.stl) — 2 in cap with 3 × Ø4 probe gland: Ø14 × 22 boss, two O-ring grooves Ø6.4 × 2 — printable, 45° rims
- gland-cap-2in-6mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x1-45.stl) — 2 in cap with 1 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-2in-6mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x2-45.stl) — 2 in cap with 2 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-2in-6mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6mm-x3-45.stl) — 2 in cap with 3 × Ø6 probe gland: Ø16 × 22 boss, two O-ring grooves Ø8.4 × 2 — printable, 45° rims
- gland-cap-2in-6.35mm-x1-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x1-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x1-45.stl) — 2 in cap with 1 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims
- gland-cap-2in-6.35mm-x2-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x2-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x2-45.stl) — 2 in cap with 2 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims
- gland-cap-2in-6.35mm-x3-45: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x3-45.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-probe-gland-caps/gland-cap-2in-6.35mm-x3-45.stl) — 2 in cap with 3 × Ø6.35 probe gland: Ø16.35 × 22 boss, two O-ring grooves Ø8.75 × 2 — printable, 45° rims

## Questions

**Can I 3D print this?**

Yes. It is the 3D-printable version: every overhang is 45° or steeper, so it prints without supports, and the sealing face is standard ISO 2852, so a normal gasket and clamp fit.

**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.

## Fits with

- [Tri-clamp probe gland caps: Ø4, Ø6 and ¼ in probes, 1 to 3 per cap](https://xemstudio.com/objects/tri-clamp-probe-gland-caps/)
- [Tri-clamp caps with PG13.5 probe ports (12 mm pH, dissolved O₂ and CO₂ probes): 1½ to 4 in](https://xemstudio.com/objects/tri-clamp-pg13-5-probe-ports/)
- [Tri-clamp thermowells: 1½ and 2 in clamp, 2½ to 12 in insertion, ½ NPT top](https://xemstudio.com/objects/tri-clamp-thermowells/)
- [Tri-clamp brewing sensor lids: 4, 6 and 8 in caps with every port a fermenter needs](https://xemstudio.com/objects/tri-clamp-brewing-sensor-lids/)
- [Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in](https://xemstudio.com/objects/printable-tri-clamp-clamps/)