Three engineers wearing full-body coveralls, gloves, and masks use special tools to wipe fastener holes along the top edges of a hollow metal box about the size of a large living-room chair.
Source: NASA/JPL-Caltech
Published: May 24, 2022

In a clean room at NASA's Jet Propulsion Laboratory in Southern California, engineers clean fastener holes on the Europa Clipper electronics vault to prepare it for spacecraft assembly. The vault’s walls are made of 9.2-millimeter sheets of aluminum-zinc alloy that will shield much of Europa Clipper's computers and electronics from Jupiter's particle radiation, which can damage electronic hardware and software.