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 5960-01-079-7797
NSN 5835-01-373-9506
NSN 5990-01-100-1840
NSN 6240-01-106-6113
NSN 6610-01-168-7943
NSN 5945-00-081-2026
NSN 5975-01-448-6395
NSN 6130-00-843-0929
NSN 6645-01-096-4270
NSN 2925-00-236-4311
NSN 5998-00-969-8811
NSN 5985-00-843-1671