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 6650-00-353-4097
NSN 5925-00-924-9596
NSN 6220-00-175-5558
NSN 6240-01-194-2206
NSN 6240-00-129-1852
NSN 6135-00-221-4720
NSN 6610-00-772-0003
NSN 6220-01-366-4242
NSN 6130-00-469-3161
NSN 5920-00-198-4303
NSN 6110-00-170-6520
NSN 6240-00-433-7706