Well, that’s what I get for trying to do the math in my head early in the morning… before having my first cup of coffee.  The point is that they fit perfectly.  Based on PL’s experience using o-rings that were about .040 smaller, I don’t think that .010 - .020 is going to hurt anything (probably within mfg. tolerances).

 

Mark

 

 

 

Is this some kind of special American arithmetic?

Finn

Mark R Steitle wrote:

 and I had to send them back.  Note that 11.340 minus .090 is 11.230…