Do I need to see a dentist? Do I need to see a doctor? No. In our field of expertise, all you need to do is see an assembler.
I looked up the word cavity and it said, “A cavity is a hollow in an object.” So, if you are at a dentist office, a cavity is a bad thing because it is a hole in your tooth. If you are at a doctor’s office and he talks about your abdominal cavity, he is simply referring to the space in your abdomen where your organs are located. In an aircraft like the C-130, V-22, or S-92, to find a contact cavity, first, all you have to do is look at a wiring harness or cockpit panel. Second, look at one of the connectors on the aircraft electrical wiring harness. Third, notice all of the small little holes inside of the insert arrangement of the connector. Those small holes in the connector are called the contact cavities. A contact cavity simply houses a contact (which has been crimped or soldered onto an aircraft wire) or a filler plug.
To see some great images of contact cavities in aerospace aircraft wiring harness connectors, refer to this blog written on Independence Day. You can also give me a call at 817.377.WIRE  to discuss contact cavities or perhaps rewiring your fixed-wing aircraft or helicopter.