A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 5999-01-442-3648
NSN 4140-00-466-9268
NSN 5998-00-202-6279
NSN 6645-01-068-3042
NSN 5985-00-615-1446
NSN 4140-01-072-4337
NSN 6320-00-521-9350
NSN 6110-01-003-9614
NSN 5985-01-355-2779
NSN 5895-01-093-3354
NSN 5925-00-451-2061
NSN 5960-01-462-7704