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 5975-01-477-7237
NSN 6620-01-029-3705
NSN 5935-01-640-9295
NSN 5985-01-548-2098
NSN 5930-01-012-1082
NSN 5935-01-260-6856
NSN 5905-01-613-4360
NSN 5960-01-056-3041
NSN 6150-01-163-4489
NSN 6145-00-185-9962
NSN 6135-00-180-5125
NSN 5930-00-342-7467