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 5920-01-179-1363
NSN 6650-01-468-4681
NSN 5920-01-463-3156
NSN 6610-01-599-2491
NSN 6110-00-006-7987
NSN 5935-00-070-7449
NSN 5930-00-275-1267
NSN 2925-01-172-9209
NSN 6220-01-397-7416
NSN 7035-01-633-9537
NSN 5960-00-436-6269
NSN 5985-01-639-8150