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 5985-01-398-5487
NSN 5925-01-528-1139
NSN 6105-01-578-6318
NSN 5965-01-597-8749
NSN 6105-01-057-1815
NSN 6620-00-371-2183
NSN 6150-01-400-4211
NSN 5835-01-430-4765
NSN 5920-01-032-0445
NSN 6320-01-600-5808
NSN 5925-01-213-4199
NSN 5960-01-530-0581