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 5835-01-632-6627
NSN 6110-00-421-7656
NSN 5925-01-604-8985
NSN 6105-00-453-3445
NSN 5935-00-061-6101
NSN 5990-01-432-4984
NSN 5835-00-242-3763
NSN 5930-01-333-2972
NSN 6645-01-243-0468
NSN 6645-01-597-1361
NSN 5925-01-062-7973
NSN 5998-01-234-9372