From the Loftsmith community

Fuel sample adapter M12x1

Gets a fuel sample out of a port without a mess. The M12x1 thread screws onto the fitting, and the stepped barb on top gives a hose something to hold onto. The ribbed body is easy to grip and turn. Change the barb width to suit your tubing.

1 part · 6 g · 18 × 18 × 58 mm

Tall red ribbed cylinder with a stepped hose barb on top and a threaded end at the bottom
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No adjustable sizes

Ask for the sizes you want to tweak, e.g. “make the width adjustable”.

Change it in the Studio

Parts

  • sample-adapter · PETG · Thread end down on the bed, barb pointing up. No supports.

    Ridged grip. The thread and barb steps are angled to print without supports.

Print settings

Layer height
0.12 mm
Walls
4
Infill
25%
Supports
None
Notes
Print slowly. Print the threads first as a test fit on the real port.

Hardware

  • Fuel-rated hose · About 6 mm inside diameter for the barb.
  • Fuel-resistant gasket or O-ring · Optional, to seal against the port face. The adapter has no built-in seal.

Assembly

  1. Screw the adapter onto the port by hand, clockwise.
  2. Push the fuel hose onto the barb.
  3. Use a gasket or O-ring if you need a seal.

Good to know

  • I haven't tested the fit. I assumed a true M12 × 1.25 thread and a port about 10 mm long, so print it and try it on the real port before you rely on it. If it's tight or loose, change the Thread clearance slider.
  • PETG is not rated for long contact with fuel and it isn't aircraft-approved hardware. Use it for bench or non-flight sampling only.
  • The build report still flags one thin ledge inside the bore, where the thread ends. It's an internal run-out and should not affect the fit.
  • The adapter has no seal of its own. A gasket against the port face is recommended.
I printed this Remix

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