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 5930-01-521-6015
NSN 6220-01-627-4889
NSN 6650-01-293-4532
NSN 5910-00-925-2412
NSN 5945-01-321-1651
NSN 6685-00-766-8844
NSN 6620-01-360-1571
NSN 6650-00-401-7896
NSN 6150-01-386-3071
NSN 7035-01-239-7297
NSN 2925-01-208-6638
NSN 5985-01-396-7983