Help Rad cap info

[Richard in PA]

I purchased a stant rad cap (one piece) for 31. it is copper plated on inside after checking my Judge std says should be cad plated? Also it has 2 small holes 1/16" in the part that locks the cap on the rad neck what do I have? It does have the longer neck for rad cap style so it is not a gas cap.. Ant help is appreciated Richard

 

[TK in LA]

Any pictures?

 

[jw hash]

if you have a stant radiator cap it have a fiber red washer over a brass spring plate for sealing there is two holes in that plate for what I do not know,most of the stant caps I have seen the fiber washer is gone the eaton one piece radiator cap has a copper bar with two rivets in it. I restore all 30-31 gas & radiator caps I have over 60 gas & rad caps on hand , the stant caps I use them for mascots because there is no way to take them apart, send a picture to me and I tell you what you have