Washers needed *Urgent

I leant my keg system parts to a friend and he lost some of them including washers.

I don't have washers for the beer nut connection to the commercial keg coupler and shank.
Can someone tell me what the ID, OD and thickness of them are so I can pickup something similar at the hardware store?
Also, do I need a washer for the CO2 connection to the coupler as well?

This is only urgent because it's Canada day tomorrow and all stores will be closing!

Thanks in advanced!

Turns out that they are standard 5/8" washers.