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 5930-01-174-8656
NSN 5905-01-447-2806
NSN 6650-00-754-2276
NSN 6685-00-990-3694
NSN 5985-01-427-3734
NSN 5935-00-583-2459
NSN 5925-00-267-3044
NSN 5985-01-386-7105
NSN 6650-00-629-8027
NSN 6685-01-040-2238
NSN 5920-00-155-2173
NSN 4140-00-851-2552