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 5965-00-208-4896
NSN 5985-01-068-5008
NSN 5920-01-331-1101
NSN 6145-01-483-4404
NSN 5999-01-538-5536
NSN 5915-01-345-0369
NSN 5910-01-454-0127
NSN 5915-01-347-7655
NSN 6135-01-510-4663
NSN 6240-01-419-9597
NSN 5960-01-279-2589
NSN 6145-01-510-1682