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 7035-01-145-9164
NSN 5930-00-292-1089
NSN 6110-00-989-2456
NSN 5895-00-701-7064
NSN 5915-00-536-3379
NSN 6645-00-764-3355
NSN 5990-01-449-7090
NSN 5945-01-276-2765
NSN 6685-01-397-4138
NSN 5925-01-241-5091
NSN 5935-01-396-6220
NSN 5998-01-341-8109