SURFACE FINISH CROSS REFERENCE CHART All Seals Inc.
8 31 8 N4 Buff #300 400 #8 Mirror Finish 4 8 500 #8 Supermirror Finish < 4 3 8 500 #8 Supermirror Finish 4 16 4 10 N3 Buff #400 2 8 N2 1 4 N1 C SURFACE FINISH CROSS REFERENCE CHART Common USA name. ASTM A480.