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 5945-00-988-4388
NSN 6240-00-982-6748
NSN 5960-01-406-0299
NSN 7035-00-300-3208
NSN 5985-01-565-7084
NSN 6620-01-054-9346
NSN 5965-01-298-1685
NSN 5905-01-363-0268
NSN 6110-00-946-5384
NSN 5975-01-597-0122
NSN 5945-01-441-8487
NSN 5920-00-828-0148