# Printable tri-clamp (45°): NPT male, NPT female and hose-barb adapters

> Can I 3D print a tri-clamp to hose barb or NPT adapter?

- Category: Hardware › Printable tri-clamp
- Kind: Hardware
- Basis: Xem Studio design: lengths A per the standard 21MP / 22MP / 14MPHR tables used on the standard adapter pages, 45° rims; threads not modelled (male: major Ø over L2; female: tap-drill bore)
- Page: https://xemstudio.com/objects/printable-tri-clamp-adapters/ · JSON: https://xemstudio.com/api/geometry?object=printable-tri-clamp-adapters · Plain text: https://xemstudio.com/objects/printable-tri-clamp-adapters/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

- Print face down; the thread or barb end prints up.
- 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 | end | A_in |
|---|---|---|
| ½ | ¼ MNPT | 2.0 |
| ½ | ½ MNPT | 1.63 |
| ¾ | ¾ MNPT | 1.79 |
| 1 | ½ MNPT | 2.19 |
| 1 | 1 MNPT | 2.25 |
| 2 | 2 MNPT | 2.64 |
| 2½ | 2½ MNPT | 2.88 |
| 3 | 3 MNPT | 3.07 |
| 4 | 4 MNPT | 3.16 |
| ½ | ⅛ FNPT | 1.25 |
| ½ | ¼ FNPT | 1.5 |
| ¾ | ¼ FNPT | 1.5 |
| 1½ | 1½ FNPT | 2.25 |
| 2 | 2 FNPT | 2.34 |
| 3 | 3 FNPT | 2.19 |
| 4 | 4 FNPT | 2.63 |
| ½–¾ | 0.25 in barb | 1.5 |
| ½–¾ | 0.375 in barb | 1.5 |
| ½–¾ | 0.5 in barb | 1.5 |
| 1–1½ | 0.25 in barb | 1.5 |
| 1–1½ | 0.375 in barb | 1.5 |
| 1–1½ | 0.5 in barb | 1.5 |
| 1–1½ | 0.75 in barb | 1.5 |
| 1–1½ | 1 in barb | 1.687 |
| 2 | 0.5 in barb | 1.812 |
| 2 | 1.5 in barb | 2.312 |
| 3 | 3 in barb | 3.094 |
| 4 | 4 in barb | 3.406 |

## Where the files are

- Dixon: [Clamp × male NPT (T21MP) and clamp × female NPT (T22MP) adapters: A per size](https://api.dixonvalve.com/en/media/1490003) — PDF — publisher's catalogue; dimensions cited
- Steel & O'Brien: [14MPHR rubber hose adapter: A per clamp × barb size](https://www.steelobrien.com/products/sanitary-fittings/clamp-fittings/adapters/14mphr-rubber-hose-adapter/) — web — publisher's table; dimensions cited
- Dixon: [14MPHR brewery hose barb: A and barb OD B (hose ID + 0.040 in) per size, ½ to 6 in](https://www.cooneybrothers.com/userfiles/ad/documents/Dixon_Sanitary_14MPHRG600_Catalog.pdf) — PDF — publisher's catalogue; dimensions cited
- 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](https://www.asme.org/codes-standards/find-codes-standards/b1-20-1-pipe-threads-general-purpose-inch) — standard — ASME; dimensions are facts (verify at link)
- 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 (28 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/index.json

- male-npt-45cone-0.5in-x-1-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.5in-x-1-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.5in-x-1-4.stl) — ½ in × ¼ MNPT
- male-npt-45cone-0.5in-x-1-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.5in-x-1-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.5in-x-1-2.stl) — ½ in × ½ MNPT
- male-npt-45cone-0.75in-x-3-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.75in-x-3-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-0.75in-x-3-4.stl) — ¾ in × ¾ MNPT
- male-npt-45cone-1in-x-1-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-1in-x-1-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-1in-x-1-2.stl) — 1 in × ½ MNPT
- male-npt-45cone-1in-x-1: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-1in-x-1.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-1in-x-1.stl) — 1 in × 1 MNPT
- male-npt-45cone-2in-x-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-2in-x-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-2in-x-2.stl) — 2 in × 2 MNPT
- male-npt-45cone-2.5in-x-2-1-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-2.5in-x-2-1-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-2.5in-x-2-1-2.stl) — 2½ in × 2½ MNPT
- male-npt-45cone-3in-x-3: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-3in-x-3.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-3in-x-3.stl) — 3 in × 3 MNPT
- male-npt-45cone-4in-x-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-4in-x-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/male-npt-45cone-4in-x-4.stl) — 4 in × 4 MNPT
- female-npt-45cone-0.5in-x-1-8: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.5in-x-1-8.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.5in-x-1-8.stl) — ½ in × ⅛ FNPT
- female-npt-45cone-0.5in-x-1-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.5in-x-1-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.5in-x-1-4.stl) — ½ in × ¼ FNPT
- female-npt-45cone-0.75in-x-1-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.75in-x-1-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-0.75in-x-1-4.stl) — ¾ in × ¼ FNPT
- female-npt-45cone-1.5in-x-1-1-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-1.5in-x-1-1-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-1.5in-x-1-1-2.stl) — 1½ in × 1½ FNPT
- female-npt-45cone-2in-x-2: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-2in-x-2.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-2in-x-2.stl) — 2 in × 2 FNPT
- female-npt-45cone-3in-x-3: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-3in-x-3.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-3in-x-3.stl) — 3 in × 3 FNPT
- female-npt-45cone-4in-x-4: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-4in-x-4.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/female-npt-45cone-4in-x-4.stl) — 4 in × 4 FNPT
- hose-barb-45cone-0.75in-x-0.25in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.25in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.25in.stl) — ½–¾ in × 0.25 in hose barb
- hose-barb-45cone-0.75in-x-0.375in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.375in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.375in.stl) — ½–¾ in × 0.375 in hose barb
- hose-barb-45cone-0.75in-x-0.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-0.75in-x-0.5in.stl) — ½–¾ in × 0.5 in hose barb
- hose-barb-45cone-1.5in-x-0.25in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.25in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.25in.stl) — 1–1½ in × 0.25 in hose barb
- hose-barb-45cone-1.5in-x-0.375in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.375in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.375in.stl) — 1–1½ in × 0.375 in hose barb
- hose-barb-45cone-1.5in-x-0.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.5in.stl) — 1–1½ in × 0.5 in hose barb
- hose-barb-45cone-1.5in-x-0.75in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.75in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-0.75in.stl) — 1–1½ in × 0.75 in hose barb
- hose-barb-45cone-1.5in-x-1in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-1in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-1.5in-x-1in.stl) — 1–1½ in × 1 in hose barb
- hose-barb-45cone-2in-x-0.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-2in-x-0.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-2in-x-0.5in.stl) — 2 in × 0.5 in hose barb
- hose-barb-45cone-2in-x-1.5in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-2in-x-1.5in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-2in-x-1.5in.stl) — 2 in × 1.5 in hose barb
- hose-barb-45cone-3in-x-3in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-3in-x-3in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-3in-x-3in.stl) — 3 in × 3 in hose barb
- hose-barb-45cone-4in-x-4in: [STEP](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-4in-x-4in.step) · [STL](https://xemstudio.com/files/hardware/printable-tri-clamp-adapters/hose-barb-45cone-4in-x-4in.stl) — 4 in × 4 in hose barb

## Questions

**Threads?**

Not modelled: chase or tap them after printing, or print with your slicer's thread modifier.

## Fits with

- [Printable tri-clamp (45°): ferrules, spools and caps, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-45-degree-printable/)
- [Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in](https://xemstudio.com/objects/printable-tri-clamp-clamps/)
- [Printable tri-clamp (45°): 90° and 45° elbows, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-elbows/)
- [Printable tri-clamp (45°): tees, short-outlet tees and crosses, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-tees-crosses/)
- [Printable tri-clamp (45°): concentric and eccentric reducers, ½ to 4 in](https://xemstudio.com/objects/printable-tri-clamp-reducers/)
- [Printable tri-clamp (45°): dome lids and ported caps](https://xemstudio.com/objects/printable-tri-clamp-lids-caps/)