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 6610-01-502-8868
NSN 5999-00-529-0157
NSN 5895-01-430-2555
NSN 5965-00-246-5612
NSN 6130-00-657-9994
NSN 5990-00-285-1948
NSN 5905-01-056-6233
NSN 6150-00-279-9337
NSN 7035-01-502-6764
NSN 7035-01-222-0729
NSN 5990-01-093-0836
NSN 5975-01-067-9000