92 Daytona Expansion Valve

I am properly converting the AC on my 92 from R12 to R134a and I just picked up a new expansion valve today. The kit came with new metal crush gaskets and also O-rings. Why are there o-rings, I can not recall anywhere in my lines where O-rings are used except for at the compressor (TIII) Can someone tell me what these o-rings are for? Are these used on a different car that uses different lines?
Here is the part I picked up today:
https://www.oreillyauto.com/detail/b...on+valve&pos=0

Thanks

A/C drier?

Installing a new drier and that uses its own crush gaskets that came with it. So it is not used there on my car at least.

Most of the time, the gasket sets are pretty generic to cover several model years. I know when I put the new compressor and lines in my 89 Daytona, I had a bunch of left over crush gaskets and O-rings. I'm sure they are just extras.. I wouldn't worry about it. Use what you need, and discard the rest...