Break off the rivet head, using a drift pin as a pry.
Drive out the remaining rivet shank with a pin that has a diameter
equal to the rivet shank. See Figure 1-12f.
SPECIAL PURPOSE FASTENERS.
Where extra strength is required and weight is a factor, special
purpose fasteners are used instead of rivets or nuts and bolts. Some
of these areas are: where major structural units join together, where
there is high stress, and where the substructures attach to the skin.
We will discuss each fastener and its use in the following paragraphs.
Rivnuts, shown in Figure 1-13, are tubular rivets
internally threaded and counterbored and used with matching screws.
They are applied blind, and they are used where nut plates cannot
be installed. An example of such a location is the leading
edge on wings where deicing boots are attached. Rivnuts are
made in two head styles: flat and countersunk heads with
open or closed ends. The keyed rivnut is used as a nut