For this pioneer mission to Jupiter, Lenox Laser drilled precision 19.5 micron holes in Hasteloy discs for a Helium Leak Detector. Galileo Spacecraft
National Institute for Standards and Technology (NIST): Lenox Laser Fabricated an array of 5,000 orifices, each less than five microns, on a stainless steel conflat, for use as a standard, midrange high vacuum leak.
To learn more visit Galileo Spacecraft