Tools & equipment

Tube Fittings for 3D Printing: STL Models

This collection gathers STL files for tube and pipe fittings used in 3D printing setups and in general plumbing work: filament-path connectors, threaded adapters, barbed hose joints and retaining nuts. It helps you find a part by thread standard or tube diameter instead of browsing whole printer categories. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

A Polyzon collection · 44 models from 3 platforms

How this collection is put together

Polyzon assembles this collection from search results on the connected platforms. Repeats and models without a preview are removed, weak matches go to the end, and the rest keeps the search order. Models belong to their authors — check the terms on each model's page.

Selection rules: the Polyzon editorial team · Text updated 2026-10-15

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About the category

«Tube Fittings for 3D Printing: STL Models»

The models fall into a few groups. Filament-path connectors cover PTFE and Bowden tube fittings, including push-to-connect clamps, bulkhead versions and clips that hold tubing against a panel. Threaded adapters translate between BSP, NPT and metric threads, while barbed and compression connectors join larger tubes and hoses. Nuts, extension pieces and wrenches support the assembly rather than carrying the tube itself.

Before printing, match the numbers on the model page to the parts you already have: thread standard and pitch, tube outer diameter, wall thickness, and the length of the barb or spigot. Check how many separate parts the author lists and whether they are meant to be glued, threaded or snapped together. Look at the orientation notes and whether supports are needed for overhanging threads, and read the material and settings the author records. Photos of real prints show how the threads and sealing surfaces came out.

Search terms vary by region and trade: pneumatic fitting, push-to-connect, quick connector, bulkhead fitting, hose barb, compression fitting, reducer and adapter all describe overlapping parts. Adding a thread or a size to the query narrows the list, as does naming the tube material or the place where it is used. Related topics such as drybox hardware, filament guides and pipe thread gauges often lead to parts that belong to the same assembly.

FAQ

Frequently asked questions

What measurements should I check before choosing a fitting model?
Thread standard and pitch, the outer diameter of the tube, and the inner diameter of the hose or pipe the fitting joins. Model pages usually state these, along with the number of separate parts.
Do printed fittings need supports?
It depends on how the threads and barbs are oriented. Some authors model threads vertically so no supports are needed, while others note where supports have to be removed; check the description and the print photos.
What is the difference between a Bowden connector and a pneumatic fitting?
Both hold tubing in place. Bowden connectors are named for the filament path in a printer, while pneumatic fittings come from air and fluid lines; the thread and tube diameter matter more than the label.
How can I find a fitting when the exact name is unknown?
Try synonyms such as push-to-connect, quick connector, hose barb or bulkhead, and add the thread or tube size. Searching by the assembly it belongs to, like a drybox or a filament guide, also helps.
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