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: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 6105-01-265-6969
NSN 5920-01-525-3918
NSN 5895-00-081-2219
NSN 4140-00-044-1329
NSN 5835-01-281-7281
NSN 5960-01-512-0233
NSN 5910-01-397-6431
NSN 5910-00-827-9861
NSN 5960-01-234-0926
NSN 5990-01-408-6554
NSN 5985-01-417-3184
NSN 5905-00-818-3502