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 6685-00-549-9784
NSN 7035-01-493-6389
NSN 5975-01-357-5941
NSN 6320-00-468-8421
NSN 5915-00-901-7903
NSN 6145-01-487-6739
NSN 6320-01-549-7201
NSN 5910-01-112-0651
NSN 6685-00-825-2292
NSN 5965-01-415-3865
NSN 6110-00-977-6841
NSN 6105-01-499-1551