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 6130-00-692-2916
NSN 5985-01-472-0643
NSN 5999-01-455-7128
NSN 6620-00-831-2737
NSN 5915-01-039-9021
NSN 5905-01-425-2220
NSN 5835-01-286-6499
NSN 5895-01-554-3709
NSN 5960-01-617-6345
NSN 5925-00-895-3649
NSN 6610-00-166-7406
NSN 5985-01-216-4770