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 6135-00-455-2425
NSN 5930-01-552-6326
NSN 5895-00-470-7832
NSN 6685-01-424-5867
NSN 5975-01-432-0050
NSN 6150-00-891-1659
NSN 6220-01-252-0379
NSN 4140-01-415-2478
NSN 5935-01-401-5324
NSN 6240-00-522-6009
NSN 7035-00-200-5162
NSN 5930-01-232-1332