Summary

A screw-on cap for a plastic gasoline container. This design has an open collar for spouts (not included). The collar is 1-3/8 inches in diameter. Mouth is 1-11/16 inches in diameter. Threads are 4-TPI.

I made this using Tinkercad: https://www.tinkercad.com/things/eTQTZ3kUTQw

I printed this using PETG, but I think most commercial-grade caps are ABS. I'm not sure how different filaments hold up to gasoline.. I'm not a chemist. Use at your own risk.

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>i3 MK3</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>.200</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>50%</p></div></p>

Gas Cap - 1-3/8in open collar