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 5975-01-014-5493
NSN 5960-01-334-5146
NSN 5895-01-557-7204
NSN 5965-01-484-0047
NSN 5835-01-602-0311
NSN 6110-01-027-1851
NSN 5930-01-544-6236
NSN 6685-00-568-0362
NSN 5935-00-248-5863
NSN 5990-01-114-5095
NSN 5990-01-340-1306
NSN 5920-01-416-4274