b. Rivnut Installation and Removal.
Figure 3-5. Removing Blind Rivets.
Rivnuts (threaded inserts) are tubular rivets with internal threads and are
used throughout the shelter wherever blind threads are required. The types of rivnuts used in the shelter are
shown in figure 3-6 and described in table 3-3. Flat head rivnuts may be used wherever head thickness will not
interfere with installation of equipment. Countersunk head rivnuts are used for flush installation. Keyed rivnuts
are used in locations which are subject to vibration and torque. Closed end rivnuts must be used for exterior
repairs and floor repairs to keep moisture and dirt from entering panels. Open end rivnuts may be used in areas
where sealing is not required.
Figure 3-6. Rivnuts (Threaded Inserts).