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 5965-00-806-7593
NSN 6220-00-056-8827
NSN 6145-01-047-0249
NSN 5930-01-454-3728
NSN 6620-00-679-5830
NSN 2925-00-411-6324
NSN 5935-00-166-0776
NSN 5965-01-534-6396
NSN 6110-00-403-3580
NSN 6135-00-284-1406
NSN 5895-00-288-5878
NSN 5975-00-670-5213