Don't know about Autozone... that might be asking a bit much of them.
There's an old-fashioned full-service auto parts place here in town that I
know I can get them from, if you have something like that, and Napa should
be able to get them.

Here's a couple of places:

http://www.acsource.com/index.asp?PageAction=VIEWCATS&Category=265

and

http://www.aircoparts.com/AIRCO/oring.htm

has this information:

      Sanden HNBR
      HNBR
      Nitrile Black
      Green
      Black HNBR for R134a applications. Some
      HNBR is black and some green.
      Nitrile for R12 applications

Either place should be able to help you out if necessary.

If you haven't seen this you should check it out:

http://www.gti16v.com/tb879503.htm

Freeze 12 is about 80% R134a, btw.

Good luck,
Robert

I used to tell the changing of the seasons by the calendar, or by going
outside. Now I know them by the threads that appear on the Vanagon list.

----- Original Message -----
From: "John Lauterbach" <lauterba@BELLSOUTH.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, March 30, 2006 7:22 PM
Subject: O-rings for air conditioning

I am getting ready to recharge A/C on my '84.  I need to change out the
O-rings first.  I will be recharging with Freeze-12.  Are the O-rings
special or something I can find at Auto Zone?

John
Macon, GA