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 5996-00-553-7348
NSN 5990-00-992-7968
NSN 2925-01-327-3069
NSN 6110-00-092-5116
NSN 6130-00-490-3699
NSN 6610-01-581-8682
NSN 5945-00-772-2005
NSN 2925-01-656-8217
NSN 5910-00-106-5466
NSN 5985-01-011-5704
NSN 7035-01-246-3086
NSN 5985-01-222-4206