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 5925-01-553-8498
NSN 5910-01-328-7909
NSN 6685-01-056-5283
NSN 7035-01-554-7482
NSN 5855-01-100-3272
NSN 5965-01-605-4703
NSN 6130-01-463-6427
NSN 6645-01-322-8431
NSN 5965-01-024-7960
NSN 5935-01-508-9757
NSN 5990-01-243-4233
NSN 6105-01-034-5037