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 6105-01-237-6090
NSN 7035-01-088-6415
NSN 5915-01-514-5863
NSN
NSN 6320-01-519-8767
NSN 6650-01-369-1650
NSN 6130-00-408-9983
NSN 5910-01-551-1193
NSN 5935-01-161-3385
NSN 5965-00-578-8931
NSN 6650-01-524-8171
NSN 5965-01-644-6633