Originally Posted by MS1095
Appears to be wrong. See Dwg 25 top right. AN470AD4-7
However, that seems too long.
Riveting 1/8 to 1/16 angles: 0.125 + 0.063 + 1.5 * 0.125 = 0.376 * 16 = 6
So AN470AD4-6, and perhaps AD470AD4-6.5 for the rear two rivets if include the F-408 flange.
Don't know if AN470 rivets are considered hard or soft. Look them on Aircraft Spruce.