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 5975-01-155-7500
NSN 6130-01-564-6873
NSN 5920-01-172-8509
NSN 5965-01-633-8849
NSN 6685-01-121-6892
NSN 6145-00-423-1563
NSN 5975-01-345-2182
NSN 5996-01-066-9003
NSN 6685-00-248-3103
NSN 5985-01-115-7034
NSN 5975-01-474-1202
NSN 5930-00-466-9809