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 6220-00-142-5115
NSN 5996-01-563-8998
NSN 6145-01-308-9583
NSN 5920-01-194-4499
NSN 5999-01-438-8245
NSN 5910-01-273-3452
NSN 6240-00-885-6821
NSN 5930-01-501-5144
NSN 5835-01-232-6904
NSN 6610-00-278-7647
NSN 2925-01-320-6512
NSN 6130-01-015-2608