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 6610-01-312-3032
NSN 4140-00-229-8553
NSN 6320-01-176-8367
NSN 6685-01-095-0278
NSN 6130-01-392-6214
NSN 6150-01-351-5455
NSN 6145-00-089-6945
NSN 5990-01-199-4832
NSN 2925-00-471-1128
NSN 5996-01-211-8067
NSN 6135-01-090-5365
NSN 5920-01-462-7198