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 5975-01-086-4488
NSN 5985-01-359-3356
NSN 7035-01-584-7741
NSN 5855-00-125-0780
NSN 6610-01-023-1812
NSN 6650-01-444-2152
NSN 6685-01-043-0182
NSN 5960-01-605-9921
NSN 5998-00-959-6885
NSN 5895-00-964-3413
NSN 5895-01-321-1849
NSN 5975-00-947-6045