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Marine Deck Filler Key (without magnet mount) — image 1
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Marine Deck Filler Key (without magnet mount)

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Deck filler key - fits "winch handle" type deck fillers for diesel or water. 18mm bi-square.

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Bi-square deck filler key.  Typically used in marine applications on both diesel and water tank filler caps.  Much easier and less cumbersome than using a winch handle.

Suits normal 18mm bi-square filler sockets.

I printed this design in both basic PETG and in Prusament PETG C-F (carbon filled).

Even the prototype in basic PETG with 2-perimeters and 15% infill seemed strong enough when tested on the diesel cap but my final print was with 5-perimeters, 20% infill and PETG-CF.

I also made one with embedded magnets to mount on my mild steel fuel tank:

https://www.printables.com/model/1247616-marine-deck-filler-key-magnet-mount

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