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 5905-00-067-6755
NSN 6610-01-622-4326
NSN 5925-01-589-5444
NSN 5945-00-007-3933
NSN 6150-01-594-2415
NSN 7035-01-617-4375
NSN 5920-01-389-1208
NSN 5945-01-452-7905
NSN 7035-01-200-4751
NSN 5999-01-003-8461
NSN 5950-00-658-3170
NSN 5930-00-344-3106