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 7035-01-442-7947
NSN 4140-01-328-9004
NSN 6685-01-225-8594
NSN 6135-01-116-3385
NSN 7035-01-556-9183
NSN 6130-00-484-9105
NSN 6130-01-443-0837
NSN 5915-01-509-3967
NSN 6240-01-329-7228
NSN 5910-01-460-9949
NSN 5965-01-429-0881
NSN 5996-00-504-9032