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 6220-00-916-9766
NSN 7035-01-102-8111
NSN 5985-00-114-0010
NSN 6620-00-147-1014
NSN 5925-00-401-2739
NSN 6105-01-318-9478
NSN 6110-00-891-0988
NSN 6130-01-597-9447
NSN 5910-00-233-6473
NSN 2925-01-376-6760
NSN 5950-01-660-9965
NSN 5965-00-812-9158