Brief Description: Machine Countersink Fuel Tank Atch Platenuts
Machine countersink fuel tank holes for #8 fuel tank attach plate-nuts for R wing. If I do this again, I will clamp a 1”x 1” piece of wood behind the spar flange, drill pilot holes and then countersink the holes.
This would provide a guide for the pilot of the countersink preventing the countersink to wonder and produce an elongated hole.
