Here is what I would do. I would set up my carriage stop on the bed and make a suitable spacer. For a tool, I would use my parting tool. For a cutting depth of .0025" on aluminum, it will work for facing, turning and parting.
With the spacer in place, I would advance the stock to allow for a facing cut. Then I would remover the spacer and turn the o.d. to the stop where I would part off the piece. Advance the stock and repeat. It's fast and with care can easily meet your specs for length and o.d.
If finish on the face and/or part length is a concern, you can use a second op for facing the ends. A spindle stop will make that task easier. For facing, chuck runout won't be an issue so the three jaw chuck can be used.
I have used variations on this process many times for quickly making multiple parts.
