hplogger,
Just a quick note of caution,Jlu has assumed the pretty obvious, that your gasket is a spiral wound;- however, you have not described the look of the gasket and the above assumption could be incorrect, hence the m and Y may also be incorrect. For your (and our) peace of mind, try to confirm the type of the gasket you mentioned or at least describe it to us, just to be on the safe side.
cheers, gr2vessels