A COAX CAP FITS ON A K3 MIC CONNECTOR PERFECTLY. NO DUST GETTING IN THE MIC CONNECTOR FOR THE NEXT OWNER. A BUDDY SAW IT AND I GAVE HIM A CAP AND THIS IS HIS K3. WELL IT WAS HIS PHOTO I TRIED TO SEND BUT NO DICE. EMAIL ME FOR A PRIVATE EMAIL WITH THE PHOTO. 73 BENNY K5KV