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 5985-00-525-3799
NSN 5975-00-233-6301
NSN 5975-01-315-7808
NSN 2925-00-756-8510
NSN 5945-01-354-3743
NSN 6130-00-359-2747
NSN 5915-01-632-7216
NSN 6145-00-866-2323
NSN 6610-01-332-4137
NSN 6105-01-641-9590
NSN 5925-00-139-4829
NSN 5975-01-153-1927