# Snap tri-clamp, bolt-free (printable, ½ to 4 in)

> Is there a tri-clamp clamp that snaps shut without a bolt?

- Category: Hardware › Printable tri-clamp
- Kind: Hardware
- Basis: Xem Studio design (v7), tested on a 2 in printed joint
- Page: https://xemstudio.com/objects/snap-tri-clamp-bolt-free/ · JSON: https://xemstudio.com/api/geometry?object=snap-tri-clamp-bolt-free · Plain text: https://xemstudio.com/objects/snap-tri-clamp-bolt-free/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

- A two-piece tri-clamp clamp with no bolt: each half carries a flush arm whose hooked claw drops into a notch on the other half only when the halves meet — clipped or not, nothing in between. Open with a butter knife in the V at the arm tip.
- Prints flat with no supports: every downward face is 45° or steeper, both outer edges carry the same R7 round.
- Sized for the printable 45° tri-clamp ferrules and a standard silicone gasket (closes on a 2.0 mm compressed stack). One clamp per flange: ½ and ¾ in share the 25 mm flange, 1 and 1½ in the 50.5 mm flange.
- The STEP/STL pack (all six sizes) is $0.25; AI agents pay with x402 (USDC) at /api/buy/snap-tri-clamp-pack. The dimension sheet here is free.

## Sizes

| size | clamp OD | width | print footprint (one half) |
|---|---|---|---|
| ½–¾ in (25 mm flange) | 43.0 mm | 16.0 mm | 42.3 × 26.4 mm |
| 1–1½ in (50.5 mm flange) | 68.5 mm | 22.5 mm | 67.5 × 42.3 mm |
| 2 in (64 mm flange) | 82.0 mm | 23.3 mm | 80.8 × 50.7 mm |
| 2½ in (77.5 mm flange) | 95.5 mm | 24.1 mm | 94.1 × 59.1 mm |
| 3 in (91 mm flange) | 109.0 mm | 24.9 mm | 107.4 × 67.5 mm |
| 4 in (119 mm flange) | 137.0 mm | 27.5 mm | 135.0 × 84.9 mm |

## Where the files are

- Xem Studio: [Snap tri-clamp design](https://xemstudio.com/) — web — Publisher's page; dimensions are facts

## Questions

**How do you open it?**

Slide a butter knife into the V at an arm tip and lever the tip outward.

**Does it need supports?**

No — it prints flat; every downward face is 45° or steeper.

## Fits with

- [Printable tri-clamp (45°): two-bolt clamps, ½ to 8 in](https://xemstudio.com/objects/printable-tri-clamp-clamps/)
- [Printable tri-clamp (45°): ferrules, spools and caps, ½ to 4 in](https://xemstudio.com/objects/tri-clamp-45-degree-printable/)
- [Tri-clamp gasket, ISO 2852 Type B: 1.5 and 2 in](https://xemstudio.com/objects/tri-clamp-gasket/)