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 5996-01-154-2005
NSN 5925-00-929-7829
NSN 5975-00-611-8567
NSN 5998-00-399-8341
NSN 5855-00-221-9435
NSN 5895-01-310-8659
NSN 5945-01-535-1573
NSN 5930-01-380-8935
NSN 2925-00-795-4063
NSN 6610-00-719-9774
NSN 5835-01-561-2959
NSN 6105-01-391-7500