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 6145-01-621-6548
NSN 5945-01-658-1285
NSN 6685-00-239-9301
NSN 6645-01-295-4373
NSN 6105-01-052-5594
NSN 5985-00-459-9637
NSN 5895-01-585-6384
NSN 5945-00-915-1595
NSN 5945-00-479-7955
NSN 6685-01-420-6480
NSN 6685-01-046-6359
NSN 6320-00-925-0558