An item usually in the form of a ring, designed to fit on the front of an instrument to secure the window material of the instrument. See also bezel,instrument mounting.
NSN 6110-01-444-0471
NSN 5920-00-199-9498
NSN 6685-01-086-0246
NSN 6220-00-299-5647
NSN 5925-00-889-4990
NSN 6135-01-579-3534
NSN 5985-01-481-4580
NSN 6130-01-006-7990
NSN 5975-01-323-6361
NSN 5998-00-788-7455
NSN 6150-01-527-4613
NSN 5985-00-740-7154