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 5855-01-501-3081
NSN 6130-01-338-0714
NSN 5835-01-528-7454
NSN 6220-01-003-7184
NSN 5935-00-889-2646
NSN 6610-01-557-4896
NSN 6220-01-142-3148
NSN 5945-01-650-4541
NSN 6685-00-797-7543
NSN 5996-01-122-3768
NSN 5935-00-683-7894
NSN 5960-01-512-0233