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 5975-00-810-1190
NSN 5835-00-092-1136
NSN 5965-01-128-0117
NSN 6110-01-204-8841
NSN 5905-00-842-2896
NSN 5910-01-434-8866
NSN 6105-01-098-2816
NSN 6610-01-287-9814
NSN 5960-01-602-6009
NSN 2925-01-113-6904
NSN 5905-00-401-6862
NSN 5920-00-097-7648