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 5998-01-284-2628
NSN 2925-01-170-8018
NSN 6645-01-393-5128
NSN 6145-01-526-1651
NSN 5915-01-561-8253
NSN 5945-01-334-6016
NSN 6685-01-333-4007
NSN 5945-00-259-9959
NSN 5925-01-026-0891
NSN 6685-01-160-7313
NSN 5998-01-487-8962
NSN 5905-01-197-8354