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 5985-01-282-7120
NSN 5985-01-108-5352
NSN 6110-01-098-7442
NSN 6135-01-553-7711
NSN 7035-01-283-2536
NSN 6135-01-100-9056
NSN 6110-01-057-6445
NSN 5945-01-403-2800
NSN 6620-01-476-7355
NSN 5945-00-260-4333
NSN 5905-01-300-7564
NSN 5930-01-043-5331