I got what I thought were -10 AN fittings, I thought thats what I needed. When I got them they measured out to about 12.03-12.04 mm inner diameter, this is more in line with a -8AN line is it not?

To my knowledge AN fittings are whatever the fitting size is over 16".
Fo for example a -10 should be 10/16 which is 5/8= 0.625"
0.625" x 25.4mm = 15.875mm ID for a -10.

However, my -10AN measured out no where near that. Can anyone explain??


I thought the blue fitting was a -10 but after buying 2 -10's I believe it is a -8.