Fuel filler caps o-rings

[Bluebeard]

My tip tanks came with standard Vans filler caps (big o-rings are brown).

Can anyone tell me the MS numbers for (a) the large and (b)the small o-rings used in these caps?

Thanks

 

[jcaplins]

from vans:

http://www.vansaircraft.com/cgi-bin/store.cgi?ident=1430546857-128-39&browse=am&product=fuel-cap

previous thread:
http://www.vansairforce.com/community/showthread.php?t=100922

 

[Bluebeard]

Ah, thanks, I was hoping to get the MS numbers as I may be putting various chemicals into tanks that have these filler caps, I need to order o-rings that have the right resistance properties.

 

[aerhed]

Various chemicals? What are you going to do, make chemtrails?

 

[Bluebeard]

!!

No I have epoxy resin tanks that I am going to clean out with acetone or failing that with MEK. Neither substance results in happy standard o-rings .....

 

[jabarr]

I know you're looking for MS numbers (which I don't have) but the orings are available from Spruce as well-- p/n 05-02146 (large one) and p/n 05-02147 (small). The Usher numbers end with -012 and -325 which one would assume are the sizes.