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 6645-00-907-3404
NSN 5930-01-353-3817
NSN 5996-01-600-0348
NSN 6320-00-691-8514
NSN 6135-00-444-1402
NSN 5990-00-267-9956
NSN 6220-00-084-4240
NSN 5905-01-383-5597
NSN 4140-00-388-1270
NSN 5935-00-396-2368
NSN 5965-00-903-6298
NSN 6610-01-003-9763