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 5998-00-064-4595
NSN 6105-01-207-0845
NSN 5920-00-661-0840
NSN 5965-01-522-4632
NSN 7035-01-605-2346
NSN 5975-00-768-8910
NSN 6645-01-376-2336
NSN 6130-00-619-7069
NSN 7035-00-849-5526
NSN 6220-01-536-6088
NSN 6220-01-613-3663
NSN 5965-01-533-4851