Thanks, everybody, for your answers to my query. yes, I was after the wrench sizes, not the shank diameters.
Matt asked: "Is there any such thing as Metric sized AN hardware? Or would you just get high grade bolts in metric sizes if you need them... Just wondering..." Well, it is a question that I asked my French fellow builders this week-end. Their answer is: Yes, there is plenty of Metric aircraft grade hardware; it is widely used in many European aircraft designs, including, of course, Airbus airliners. But since AN stands for (US) Army-Navy, and these services seem to have no intention to shift to International Standard (Metric), it seems highly unlikely that there is such thing as "Metric AN". Unless, maybe, the US Navy encountered some Metric bolts on their French Dolphin helicopters? Also, to my knowledge, the only aircraft manufacturers that fully apply the metric system to their aircraft, from A to Z, and instrumentation included, are the Russians. Serge Vidal Paris, France
