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 6135-00-134-6648
NSN 5990-01-188-7309
NSN 6645-01-044-6376
NSN 4140-00-137-9633
NSN 5835-00-491-3834
NSN 6220-01-649-5291
NSN 6110-00-893-9802
NSN 5990-01-326-9862
NSN 5925-01-211-6660
NSN 6650-00-754-2276
NSN 6610-01-161-4835
NSN 5915-01-451-7535