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 6145-01-014-5209
NSN 5990-01-621-6969
NSN 6110-00-598-2574
NSN 5915-00-737-0924
NSN 6240-01-342-5056
NSN 6145-00-252-8969
NSN 5935-01-444-1851
NSN 6650-01-455-8923
NSN 5996-01-206-4104
NSN 5999-01-269-0333
NSN 6135-01-230-4399
NSN 6130-01-483-2111