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 5990-00-505-1546
NSN 6105-00-484-9270
NSN 4140-00-988-8632
NSN 6130-00-140-2582
NSN 2925-00-969-8340
NSN 5999-01-105-5522
NSN 5985-00-529-0093
NSN 5990-00-110-1153
NSN 5915-00-222-6031
NSN 6110-01-342-5900
NSN 6135-01-142-2417
NSN 6320-01-230-8444