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 6135-01-069-2482
NSN 5920-01-192-5535
NSN 6645-01-351-1154
NSN 5965-01-248-4892
NSN 6650-01-563-6732
NSN 6650-00-680-9595
NSN 6320-00-925-0558
NSN 5960-01-579-9493
NSN 5910-00-269-4755
NSN 5910-00-783-6247
NSN 5950-01-621-2907
NSN 6135-00-161-0746