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 7035-01-388-6943
NSN 5998-01-546-0778
NSN 5895-01-026-9002
NSN 5950-01-653-4800
NSN 6685-00-883-0270
NSN 5975-01-289-8991
NSN 4140-01-604-9981
NSN 5945-00-883-0301
NSN 5975-00-189-0857
NSN 5925-01-291-6863
NSN 6130-01-115-3268
NSN 5925-01-102-6486