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 5965-00-132-6436
NSN 6650-01-024-9554
NSN 5915-01-394-5150
NSN 6135-01-174-3807
NSN 5930-00-647-3493
NSN 6240-01-598-5733
NSN 6240-00-499-3276
NSN 5998-01-359-4780
NSN 6150-01-044-7832
NSN 5999-01-443-3133
NSN 6110-01-157-8253
NSN 5915-01-261-0850