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 5950-01-040-6816
NSN 6135-01-290-6487
NSN 6145-01-373-7769
NSN 6650-01-068-5021
NSN 5950-00-084-4199
NSN 5930-00-193-7349
NSN 6135-00-840-6451
NSN 5835-00-286-5432
NSN 5855-01-568-5535
NSN 5925-01-099-0974
NSN 5915-01-468-4907
NSN 5855-00-494-9581