I am looking for a source on the east coast for 21/32 x 3/8 aluminum bar. I purchased years ago.no idea where?

Answer 1

Most bar is going to be sold in 1/8" increments. You will probably have to have some specially made for you. Maybe you can just order 11/16" x3/8" and have it shaved down slightly by a machine shop. No one is going to stock 21/32 aluminum bar.