# Sanitary clamp end caps (16AMP): ½ to 4 in

> What are the dimensions of a tri-clamp end cap for each size?

- Category: Hardware › Sanitary clamp fittings
- Kind: Standard part
- Basis: ASME BPE / 3-A clamp-fitting dimensions published identically by Dixon and Steel & O'Brien; ISO 2852 face profile
- Page: https://xemstudio.com/objects/sanitary-clamp-end-caps/ · JSON: https://xemstudio.com/api/geometry?object=sanitary-clamp-end-caps · Plain text: https://xemstudio.com/objects/sanitary-clamp-end-caps/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

**Exact dimensions.** Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part.

## Notes

- A solid end cap (16AMP) with the ISO 2852 face. Caps go by flange, not tube: one cap closes both ½ and ¾ in (Ø25.0), one closes both 1 and 1½ in (Ø50.5).
- Thickness: 4.78 mm (0.188 in) on the Ø25.0 cap, 6.35 mm (0.25 in) on Ø50.5 to Ø91.0, 7.92 mm (0.312 in) on the 4 in Ø119.0 cap.
- Faces are the ISO 2852 profile (2.85 mm rim, 1.6 mm gasket recess, 20° back cone run on from the rim to the flat back, as on a ferrule) on the BPE flange diameters; the groove diameter on ½, ¾ and 4 in is derived (flange − 7.0 / 7.5 mm), the rest is from the standard.
- The 6 mm cap the tri-clamp engine heads are built on is a separate page (tri-clamp-end-cap).

## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn)

| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| clamp faces | ISO 2852 / BPE flange | clamp + Type B gasket | clamp | all |

## Sizes

| file | flange_od_mm | groove_mm | thickness_mm |
|---|---|---|---|
| cap-0.5–0.75in | 25.0 | 18.0 | 4.78 |
| cap-1–1.5in | 50.5 | 43.5 | 6.35 |
| cap-2in | 64.0 | 56.5 | 6.35 |
| cap-2.5in | 77.5 | 70.5 | 6.35 |
| cap-3in | 91.0 | 83.5 | 6.35 |
| cap-4in | 119.0 | 111.5 | 7.92 |

## Where the files are

- ASME: [BPE Bioprocessing Equipment (clamp fitting dimensions, tube OD and wall)](https://www.asme.org/codes-standards/find-codes-standards/bpe-bioprocessing-equipment) — standard — ASME; dimensions are facts (verify at link)
- ISO (via iTeh sample): [ISO 2852 clamp liners: face profile and flange / groove diameters](https://cdn.standards.iteh.ai/samples/7850/eb49c396488d408c8ced3e2961d76cf3/ISO-2852-1974.pdf) — PDF — standard excerpt; dimensions are facts
- Dixon Sanitary: [Clamp elbows, ferrules: dimension sheet](https://dixonvalve.com/en/media/1397776) — PDF — publisher's catalogue; dimensions cited, nothing copied
- Steel & O'Brien: [Sanitary products catalog 2024 (clamp fittings dimension tables)](https://www.steelobrien.com/wp-content/uploads/2024/03/Sanitary-2024-FINAL.pdf) — PDF — publisher's catalogue; dimensions cited, nothing copied

## Free STEP/STL (6 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/sanitary-clamp-end-caps/index.json

- cap-0.5–0.75in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-0.5–0.75in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-0.5–0.75in.stl) — solid end cap (16AMP) for 0.5–0.75 in: Ø25 × 4.78 mm
- cap-1–1.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-1–1.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-1–1.5in.stl) — solid end cap (16AMP) for 1–1.5 in: Ø50.5 × 6.35 mm
- cap-2in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-2in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-2in.stl) — solid end cap (16AMP) for 2 in: Ø64 × 6.35 mm
- cap-2.5in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-2.5in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-2.5in.stl) — solid end cap (16AMP) for 2.5 in: Ø77.5 × 6.35 mm
- cap-3in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-3in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-3in.stl) — solid end cap (16AMP) for 3 in: Ø91 × 6.35 mm
- cap-4in: [STEP](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-4in.step) · [STL](https://xemstudio.com/files/hardware/sanitary-clamp-caps-ferrules-spools/cap-4in.stl) — solid end cap (16AMP) for 4 in: Ø119 × 7.92 mm

## How it fits

### Goes in or on
- [Sanitary clamp weld ferrules, short and medium: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-ferrules/): closes a ferrule face of the same flange

### Alternatives
- [Tri-clamp end cap, 6 mm flat: 1.5 and 2 in](https://xemstudio.com/objects/tri-clamp-end-cap/): 6 mm cap, 1.5 and 2 in

### Also needed
- [Sanitary clamp gaskets, ISO 2852 Type B: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-gaskets/): Type B gasket between the faces
- [Tri-clamp clamp, two-bolt: every flange size ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/): clamp over the joint

## Questions

**How thick is a 2 inch tri-clamp end cap?**

6.35 mm (0.25 in) on the Ø64.0 flange.

**Does a 1 inch cap fit a 1½ inch ferrule?**

Yes: both use the Ø50.5 flange, so one cap closes either.

## Fits with

- [Sanitary clamp weld ferrules, short and medium: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-ferrules/)
- [Sanitary clamp gaskets, ISO 2852 Type B: ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-gaskets/)
- [Sanitary clamp spools: 3, 6 and 12 in, ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-spools/)
- [Tri-clamp end cap, 6 mm flat: 1.5 and 2 in](https://xemstudio.com/objects/tri-clamp-end-cap/)
- [Tri-clamp clamp, two-bolt: every flange size ½ to 4 in](https://xemstudio.com/objects/tri-clamp-clamps/)
- [Sanitary clamp tees and short-outlet tees (7MP, 7MPS): ½ to 4 in](https://xemstudio.com/objects/sanitary-clamp-tees/)