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 6685-01-266-4663
NSN 5895-01-438-2611
NSN 5975-01-483-6245
NSN 5965-01-205-6249
NSN 6320-00-831-2227
NSN 6620-01-630-6759
NSN 5996-01-510-3257
NSN 5930-01-291-4040
NSN 5935-00-012-8438
NSN 5905-01-239-1841
NSN 6240-01-094-2280
NSN 6645-01-165-3785