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 5930-01-145-2440
NSN 6645-01-400-2119
NSN 5915-00-583-4229
NSN 5855-00-477-9943
NSN 6240-01-173-7809
NSN 5910-01-465-4910
NSN 6240-01-437-6547
NSN 6685-00-004-5285
NSN 5895-00-082-4269
NSN 5855-00-337-3679
NSN 5935-01-314-3507
NSN 6150-00-966-6645