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 5835-00-876-4544
NSN 6135-01-026-9960
NSN 5996-00-255-5567
NSN 6105-00-326-5081
NSN 4140-00-977-6297
NSN 5915-00-516-9987
NSN 6105-00-081-9090
NSN 5985-00-891-9652
NSN 6650-01-259-1761
NSN 5915-01-444-4946
NSN 5975-01-539-7092
NSN 5935-01-469-0908