The surest way to confirm nutplate size is by checking it with a screw or bolt of a know size.
Even though the -5 size is depicted in the chart, none of the RV kits use a -5 nutplate.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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