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 6105-01-294-3986
NSN 5935-00-920-5462
NSN 5895-01-597-6051
NSN 5945-01-245-3389
NSN 6220-01-160-7247
NSN 6110-01-393-7645
NSN 5945-01-343-8350
NSN 5915-01-459-8059
NSN 5945-00-965-7147
NSN 6610-01-298-8667
NSN 6105-01-530-3596
NSN 5998-01-025-6764