B-64-02-02-02 | 1/8"
B-64-03-03-03 | 3/16"
B-64-04-04-04 | 1/4"
B-64-05-05-05 | 5/16"
B-64-06-06-06 | 3/8"
B-64-08-08-08 | 1/2"
B-64-10-10-10 | 5/8"
B-64-12-12-12 | 3/4"

This brass hydraulic compression tube fitting adapter is equivalent to the following:
-SAE 060401BA
-Eaton Weatherhead 64