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 6240-01-150-9290
NSN 2925-01-225-0713
NSN 5985-00-280-8057
NSN 5930-00-286-8560
NSN 6135-00-676-5807
NSN 6135-01-608-3470
NSN 2925-00-553-8799
NSN 5996-01-430-7180
NSN 6320-01-369-1648
NSN 5945-00-019-0176
NSN 6150-00-972-8063
NSN 7035-01-261-6779