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: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 6105-01-139-4778
NSN 6150-01-056-4345
NSN 5950-01-316-2006
NSN 5835-00-864-4481
NSN 5855-01-552-4759
NSN 5950-01-202-9480
NSN 7035-01-024-9511
NSN 6685-01-086-4715
NSN 5998-01-535-6004
NSN 7035-01-238-9301
NSN 5920-01-450-0614
NSN 6110-01-411-7392