Make sure that the details on the edge of the bearing are correctly interpreted. Radar Waveguide spares, gaskets, flanges, sections, please ask for your needs. Most waveguides have a number stamped on the flange somewhere and that is vital for the correct matching of spares. Carbon Brushes can be a nightmare for replacement if you don't know where to go. Simple, sandwich, high altitude, long-life, tell us what it is for and see if we can help with replacements.
Quartz crystals can be a bit of a problem for todays communications engineers.
DART Aviation Systems have a reputation for rarely saying NO and certainly for the speed that components can be located and supplied. We are always receptive to requests for new products that we have not as yet handled. Please give us a call and see if we can help. We look forward to being of service to you.