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 6610-00-320-9606
NSN 6645-01-200-5289
NSN 6145-01-065-0799
NSN 5945-01-306-9610
NSN 6645-00-736-0476
NSN 5965-01-354-9834
NSN 5915-00-409-6127
NSN 5960-00-007-4179
NSN 7035-01-391-0432
NSN 2925-00-964-7128
NSN 5905-00-081-0434
NSN 5905-00-774-3914