Panduit KIMS-H366-C2 Low Profile Mount, Push Rivet Applied, Nylon 6.6, Integral Push Rivet Mounting Method, Red, 0.144" Hole Diameter (Pack of 100)

every possible projection from the outer surface of the airplane everything that would induce turbulence with its attendant drag must be reduced to a minimum the use of a rivet whose head is flush with the surface being riveted eliminates the drag of the ordinary rivet head and thus aids in accomplishing our higher speeds the choice of method to be used in flush riveting is based on the thickness of the sheet next to the manufactured head let's assume we're driving a rivet one-eighth inch in diameter with a 100 degree countersunk head probably the best production method involves sheets of forty thousands thickness or greater we start with the assembly of the sheets drilling the correct size hole for the given rivet we're using a one eighth inch rivet so we drill a number 30 hole then countersink using a special countersinking tool with a 2 flute cutter and with a 100 degree cutting angl