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Scuba tank dust cap (DIN)

A dust cap to protect the valve of a scuba diving tank with DIN connector (G 5/8" BSP).
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updated January 10, 2026

Description

A handy dust cap for protecting the DIN outlet of your scuba tank from dust and moisture. Can be attached to a string to prevent loss.

You may use different colors (red/green) to indicate empty and filled tanks or different gases (e.g. Nitrox).

Note: All tank caps I printed with PLA for my local scuba group survived a week-long dive trip in Egypt without any problems, breaks or discolorations. Maybe PETG or other materials are even better suited for harsh UV-radiation and saltwater.

What you need

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Parts used (BOM)

Tools used

  • Optional: Scissors

  • Optional: Pocket lighter

Suggested print settings

  • Rafts: No

  • Supports: No

  • Resolution: 0.1mm

  • Infill: 25% or higher

  • Perimeters: 4 or more

Instructions

  • Print scuba tank dust cap

  • Cut paracord string to rough length

  • Seal ends with your lighter

  • Thread string through hole in dust cap

  • Tie a knot

  • Happy Diving 🤿

Related models

The regulator cap fits perfectly to the related scuba tank cap.

Tags



Model origin

The author marked this model as their own original creation.

License