Surely I'm not the only one that has lost an o-ring or 2 from their fuel caps on the VP Utility jugs. I got out my calipers the other day and found a perfect replacement from McMaster-Carr. Got it in today and works perfect. No more leaks and a lot cheaper than a new cap!
Viton O-ring
Fractional Size
ID
2 3/4"
OD 3 1/8"
3/16" width
http://www.mcmaster.com/#9464k58/
Viton O-ring
Fractional Size
ID
2 3/4"
OD 3 1/8"
3/16" width
http://www.mcmaster.com/#9464k58/