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 6685-01-514-7783
NSN 5915-01-273-2183
NSN 2925-01-424-0235
NSN 5990-01-099-8574
NSN 5855-01-328-5913
NSN 6150-01-393-0621
NSN 6150-01-057-8918
NSN 5960-01-649-1341
NSN 6650-01-504-0956
NSN 5950-01-396-3278
NSN 6645-01-633-1852
NSN 5915-01-535-1185