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 5915-01-027-7339
NSN 6130-00-277-7321
NSN 6150-00-252-6242
NSN 5935-00-030-0240
NSN 5855-01-472-2484
NSN 5915-01-521-2953
NSN 6650-01-658-1748
NSN 6150-00-853-5877
NSN 6110-01-144-9744
NSN 6150-00-812-1965
NSN 6650-00-078-5773
NSN 6685-01-094-9379