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 2925-01-021-7563
NSN 6320-01-176-8367
NSN 6685-00-248-1691
NSN 6130-00-023-8701
NSN 4140-01-492-5999
NSN 5975-01-568-7061
NSN 6610-01-167-8747
NSN 5930-01-060-8050
NSN 6620-01-423-0833
NSN 2925-01-354-1752
NSN 5920-01-541-9171
NSN 5855-00-862-3345