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 6135-00-078-9931
NSN 5925-01-123-9866
NSN 6645-00-222-2785
NSN 5855-00-631-4565
NSN 6150-01-204-0040
NSN 5975-01-282-9352
NSN 5895-00-182-6327
NSN 5905-01-476-7708
NSN 5960-01-563-6975
NSN 6145-01-014-8350
NSN 6135-01-119-0720
NSN 6105-01-104-5214